Allergy Symptoms Duration Guide

How Long Do Allergies Last?[Information Guide]

In Environmental Allergies, Food Allergy Natural Treatment by Anthony2 Comments

Allergy Symptoms Duration GuideAllergy Duration Guide

Personally, I have and had many different types of allergies that I needed to deal with since my childhood. I was allergic to the pollen of pretty much every plant of each allergy season, but I also had allergies to a lot of different foods. As a child, I could only safely eat stuff like chicken and rice because legumes, fish, raw fruits and vegetables, and nuts made my throat swell.

Since I started researching potential root causes of allergies, I have found a lot of answers that had helped me heal most of my allergies and sensitivities. But I also came across many unanswered questions, some of which seem very simple to answer. I’m not sure why science and research cannot answer many easy allergy questions like “How long do allergies last?” or “How long do symptoms of allergies last?” But it’s probably because science and research are too focused on pointless corporation-funded studies that try to prove why Gatorade is healthy and you should buy it (it’s just sugar and salt water).

But I’m here and I’m an environmental researcher who has spent way too much time suffering from allergies, so I think that my experiences might be able to answer your questions. That in combination with anecdotal evidence and international research might push society towards finding out what allergies really are.

Therefore, here’s some information about different types of allergies and how long they and their symptoms will last for. That way, you can determine if something is out of the norm and if you should take further action or change the way you perceive your own health problems.

How Long Do Allergies Last

How Long Do Food Allergy Symptoms Last?

What’s really difficult about finding out information about an individual’s allergies is the technicality of health terms and awareness of them in the first place. Many people describe their food sensitivities as allergies, but this is not the case at all.

You might come across some false information because of this. For instance, if you have oral allergy syndrome like I do, your face and throat will be itchy after eating certain raw fruits and vegetables which all correlate closely to a season’s primary pollen count. If you just ate a banana and your throat is feeling scratchy and annoying, you might think you have a banana allergy when it’s actually oral allergy syndrome, a type of food intolerance or sensitivity.

A real food allergy occurs when you eat a particular food item and your body reacts violently in the same way it does to an infectious pathogen. Peanut allergies, for example, can cause your throat to swell in anaphylaxis and this symptom separates deadly food allergies from food intolerance.

Usually 30 minutes to 3 hours, but a second wave can occur later

Symptoms of food allergies can begin immediately after being exposed to the allergen or they can start up to two hours after exposure. Depending on a person’s unique health status, the process of allergic reaction can occur in “waves.” Typically, the first wave of food allergy symptoms will last for about 30 minutes to 3 hours. This is the most intense phase of the allergic reaction, which could include anaphylaxis and possible death.

Some people with food allergies experience a second wave of symptoms after the first wave has subsided. This is called a “biphasic allergic reaction” or “biphasic anaphylaxis” if the food allergy is very severe. For many, this strange reaction can occur up to 10 to 72 hours later after the first wave was over.

The second wave of a severe allergic reaction typically lasts for around 2 hours at its peak intensity. However, the symptoms of the second wave allergic reaction will linger for 2-3 days after it begins. Three days after, your health should return to normal if you haven’t been exposed to the same or another allergen in the meantime.

I’m not recommending that you wait out the allergy symptoms for 3 days because you should definitely contact your doctor and see what they have to say. After all, they have all your medical records and can give you a better perspective of your health as a unique individual. Somebody on the internet could never really provide accurate advice for individuals like they can for this reason.

How Long Do Food Intolerance Symptoms Last?

Food intolerance symptoms can start anywhere between immediately and 48 hours after exposing yourself. In most cases, symptoms of a sensitivity will subside within 3 hours. However, some food intolerance symptoms like those associated with lactose could last from 3 hours to two weeks.

That’s typically the extreme case for a food intolerance and it depends on your unique state of health and particular sensitivity. The duration the symptoms last for can be directly correlated with two things:

  1. How long the food stays in your system and
  2. How long your immune system takes to neutralize the trigger or give up on targeting it

Using lactose intolerance as an example because it is probably the most common, dairy can stay in your system anywhere from 2 days to two weeks after consuming it.

The duration of food intolerance symptoms can be a little bit more diversified depending on the specific type of food sensitivity that you have. A food intolerance basically defines anything that is not exactly an allergy, but your immune system responds in a more mild way.

IgE vs IgG Antibodies

To define what food sensitivity is compared to allergies within your body, the chemical difference is the release of IgE antibodies (when you are infected with a multicellular pathogen) and IgG antibodies (when you are infected with a single-celled pathogen). Read more about IgE vs IgG antibodies here.

Strangely, when you are exposed to an allergen like pollen or food, your body responds in the same way that it would against a parasitic worm, which defines allergies as a health condition releasing IgE antibodies. This creates a more intense on-site inflammation because your body is confused and feels that it needs to kill the large invader, but its just pollen or food. On the other hand, IgG antibodies are released when small bacterial or viral invaders are present, as well as minor food sensitivities.

IgG-produced inflammation is much more mild than IgE allergic inflammation. During a food sensitivity, the cells are marked with small amounts of inflammation so that they can be quickly eliminated.

IgE versus IgG Immune Allergy Reactions

How Long Do Seasonal Allergy Symptoms Last?

The symptoms associated with seasonal allergies can be directly correlated with the duration that histamine stays in your body for. This is the immune chemical that is released to create inflammation at the site of an allergen like pollen.

Research has proven that the symptoms of seasonal allergies can last for 10 to 60 minutes after exposure to pollen.

Of course, if you are exposed to more pollen during this time frame, the clock will reset and the histamine consistently released in your body will create more inflammation. That’s why it’s important to avoid your allergens entirely to steer clear of allergy symptoms. Seasonal allergies are probably the hardest to avoid though because pollen is scattered throughout the air during peak productive hours of the day.

It was very hard to determine how long histamine stays in your system because of this. Research was unable to pinpoint the half-life of histamine because more and more is constantly released when you are exposed to an allergen. However, they were able to track histamine compounds carefully when they were chemically paired with an amino acid. Even so, the results of these studies were varied in that histamine could linger in your system anywhere from 10 minutes to an hour.

Half-Life of Histamine

What we can learn from this determination is that everybody’s health is dramatically different. This is just conclusive evidence that one person’s body was 6 times more able to break down excess amounts of histamine with diamine oxidase enzymes. Therefore, one person’s immune system can be at least six times stronger than another individual’s.

The factors that may affect how long histamine lingers in your system involves the health of your immune function. It may be affected by infections present in your body, including parasitic infections of your digestive tract and overgrowths of probiotic flora like Candida albicans. Another large factor that can damage your immune system is mineral deficiency. I talk all the time about how scary common sulfur deficiency is and how simple it is to cure for you and your children who have allergies and food intolerance.

How Long Does Spring Allergy Season Last?

The spring is the time trees and flowers bloom and begin to spread their pollen throughout the air for the purpose of reproduction. Flowers don’t release nearly as much pollen as trees do, which is why the spring is commonly called tree pollen allergy season.

The spring pollen allergy season begins around the end of February and ends near the middle of May. That means that tree pollen allergy season lasts for around four months.

During this time, many people feel the need to resort to taking an OTC antihistamine. It might be a well-calculated idea because the spring time is the most severe period of the year for allergy sufferers. Trees release far more pollen than flowers, grass, or weeds.

If your allergies are severe throughout the spring days, you can take an antihistamine, but please be careful that some of these OTC drugs are physically addictive. I remember one season, I began to take Zyrtec and by the end of May, I couldn’t stop taking it because I was getting intense itching sensations all over.

Watch out for antihistamine addiction during spring

This was definitely something that I’d describe as antihistamine withdrawal. I have tried to dedicate this site to warning about the dangers of addictive antihistamines and praise natural antihistamines that work much better.

After I have switched to taking a natural antihistamine derived from food, rather than artificial chemicals, my health has improved tremendously. Rather than experiencing side effects from these drugs, natural antihistamines can provide side BENEFITS like boosts in energy and mental clarity.

Read more here about the best natural antihistamines that are available and are soon going to be released onto the market. The pharmaceutical industry is scared of these supplements for a reason. They work much more effectively, for longer, with no side effects, they are cheaper, and they provide benefits. The OTC antihistamine companies are going to go out of business soon in my opinion!

How Long Does Summer Allergy Season Last?

Summer allergy season begins around the end of May and lasts until the middle of July. That means that grass pollen season lasts for around 2 months.

Summer is the time of the year when grass begins to release its pollen into the air for the purpose of reproduction. When you think about it, grass is much smaller than trees and they are much closer to the surface of the earth. That’s all they need to be because grass reproduces along the horizontal surface of the earth.

That should make you feel better about the coming summer because grass doesn’t release much pollen up into the air. However, this is the time where we are obsessed with mowing our lawns. When we do this, grass pollen shoots up everywhere and is kicked up into the wind for all the world’s people to suffer.

Lawn mowers that blast grass everywhere are obnoxious and unnecessary

It sounds like an ancient Greek myth, but summer allergies really aren’t necessary. You can 100% blame the people who constantly mow their lawns and don’t have a lawn mower that collects the grass trimmings. The older and more obnoxious styles of lawn mowers kick up and blow the pollen everywhere when it should be collected, especially during the summer for these reasons.

Some of the best tips for avoiding summer pollen allergy symptoms is to steer clear of the pollen by closing windows and doors. They should especially be closed during the day when pollen is released from the grass, but also when your neighbors choose to mow the lawn. I see nothing strange about mowing the lawn at night, except if it’s really loud. Perhaps more people should for the sake of allergy sufferers.

But, again, kicking up grass pollen during summer can be avoided if you have a lawn mower from this century that collects the grass trimmings to be disposed of. The older ones that blow the pollen everywhere and make so much noise are absolutely obnoxious at this point. Sorry I’m so emotional about this though LOL! Stop ruining my summer!

How Long Does Fall Allergy Season Last?

Ragweed pollen allergy season begins in July and typically ends in November or when the ground first freezes during snowy weather. Therefore, the fall allergy season lasts for around 5 months.

Fall is the time of the year when weeds release their pollen for reproduction. Climate change has been affecting the initial start of the season because parts of the planet are heating and cooling inappropriately according to the calendar. This might explain why the ragweed allergy season is getting longer.


If you have a question or something to add about the duration of allergy seasons and allergy symptoms, please leave me a comment in the form below! The internet doesn’t accurately answer some of the most simple questions about allergies and I would like to investigate them.

Talk to you soon,


How Long Do Allergies Last?[Information Guide] was last modified: November 8th, 2018 by Anthony


  1. Omg I am so excited and relieved to have found this website. I am literally jumping up a and down right now telling my Husband listen, listen, listen. I will try to make I short and sweet. I have been very, very, very, sick since Sept. of 2017. I have been to the er 4 times and 3 different drs. All of them dismissing all of my symptoms. Itchy face, fatigue, dry mouth, chapped lips, bald spot on my head, etc, etc, etc. They all mad e me feel like I was crazy and blamed it on the cellulitis I was diagnosed with in August of 2017. 3 of the drs told me I had mental issues and need a shrink. The last time u went to the er from extreme fatigue the Dr said you need to quit coming to the er and go to a Dr. So after reaching for two months online I came across Candida overgrowth. The very first symptoms I was complaining about, was actually thrush in the mouth. Can you believe not one Dr I went to ever said open your mouth and let me look at your tongue!! It still blows my mind! So I immediately went on thr Candida Diet and started taking 400 billion probiotics. I take something that is called The Coconut Cult. I have read the best probiotics to get are not pill form. This is the most disgusting stuff I have ever eaten. But one serving is 400 billion. Anyways i was very, very, very, strict on my diet too. Next thing you know I have parasites in my stool. I mean worms and other strange looking things. I almost collapsed. No lie. I hve gone through so much I’ve lost two friends because they probably got tired of hearing me complain about my illness (Candida Overgrowth) and probably never believed me. Drs made me feel crazy. My job asked if I was in drugs. My main support and to talk and complete love and support has come from my awesome Husband, and amazing Daughter. Oh and I can’t forget my best friend. Yes I’m rambling I know. Okay I’m just going to stop and get to the point. I am actually taking a Candida Cleanse right now with a very high dose of garlic bulb. Abouta week or so into it is hen I saw the parasites. So I made my Husband look at my stool to confirm. Lol and he did. Ithought I was going to lose but I’ve pulled myself together. But I refuse to go to a Western Dr. and woukd like to know if the Candida Cleanser I’m taking (I don’t know if I should name it) will take care of the parasites or is it possible they are dormant and I need to get the parasite cleanse you talk about. And if I should should start taking it now or wait until I’m finished with the Candida Cleanse? Today is the4th day in a row with not 1 flareup or die off symptom. It’s my ammune system. Complete lack of ammune system. I had to go down to part time at work and really to to go back full time obviously for money reasons. I cannot tell how happy and elated I feel right now after finding your site. To be honest I am not even sure if I’m in the right place to leave you a msg. Probably not since I literally habw no focus at all.. And no patience. So if anyone else reads this and Anthony won’t see it please reply and let me know. Thank you!!!!!!! Nikki…..

    1. Author

      Hey Nikki,
      I think you’re on exactly the right track. More so than the doctor you’re seeing. It’s possible that these are just symptoms of an infection that goes undiagnosed. As for the Candida cleanse question, I would take the cleanse along with another protocol for parasites. The substances that kill yeast are not the same as those for living organisms like worms. I’d take both of the protocols together. Let me know what you think!

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