Common Symptoms of Food Intolerance

Common Symptoms of Food Intolerance

Food intolerances can be tricky to pin down because everybody expresses them differently. However, there are several symptoms that are very common, and that’s what we are going to chat about today. If any of the following symptoms are plaguing you, it’s definitely worth looking into food intolerances as a possible cause. It can be quite easy to rectify, as once you have a food intolerance test and then remove the foods that are inflaming your body, the symptoms can quickly disappear too.

Common digestive tract symptoms caused by food intolerance

Your digestive tract is the number one spot that food intolerance symptoms show up. Food is digested here, and if it’s causing inflammation and irritation, then it makes sense that your gut will show symptoms. Here are some popular ones to watch out for:

From mild to severe, bloating is a classic sign that something isn’t right within your digestive tract. It can be caused by a lack of digestive enzymes, meaning you can’t break your food down properly. If you are lactose or fructose intolerant, bloating can be particularly severe.

Flatulence or belching
Both are not fun, particularly in social settings or at work. If you are reacting to foods with excess gas, it often comes on quite quickly after eating the offending food and can last all day or night.

This can be quite urgent or very frequent throughout the day. Often IBS symptoms can be caused by food intolerances as well, mainly fructose and lactose intolerance.

Dry, hard and painful stools are another symptom that can be caused by food intolerances. Couple this with dehydration and you have a painful issue on your hands. To combat this, make sure you are staying hydrated with pure water, up to 2Litres daily.

Stomach cramps or pains
This can be your warning sign that diarrhoea is imminent, or you may just get the cramping on its own.

This is one that can be a symptom of food intolerance but can also be linked to many other conditions. If you get nausea’s every time you eat a particular food, it may very well be related to that food. A food intolerance test will help you out in identifying if your issues are caused by food, and what those foods are.

Common nervous system symptoms caused by food intolerance

Your nervous system is quite sensitive to any inflammation in your body, which means that any toxic inflammation caused by food intolerances can often cause symptoms here too. The most common ones are:


This can be an absolute killer, due to how fast and strong the tiredness can hit. People often describe this as extreme lethargy, and they feel like they cannot get through the afternoon without a nap. It is caused by an inflammatory response to foods, which taxes your digestive system and causes your body to use up a significant amount of energy trying to digest the food and get rid of the toxins.

Brain fog
This is a classic food intolerance symptom, and it feels like you are walking around with a cloud over your head and thoughts all day. It’s caused by inflammatory products reaching your brain and dampening its ability to function optimally.

These can range from a mild headache to full-blown migraines that require darkness and bed rest. Often sulphites in foods can trigger migraines. However, they can be triggered by any foods that cause inflammation in your body.

Common immune system symptoms caused by food intolerance

Skin issues – Itchy rashes, acne or eczema, are common expressions of food intolerance. Our skin is one of our largest organs of detoxification, and what’s happening with skin symptoms is the body trying to cleanse itself of excess toxins and inflammatory products via the skin. Excess sweating may also be noticed.

Runny nose – A runny nose or hayfever type symptoms is also a common reaction to food intolerance. If you eat a particular food and get a running nose soon after, it can be a sign that your body is trying to cleanse itself, and it can also mean that histamine has been triggered to release. Excess histamine can be released by food intolerances and causes hayfever type symptomsas well as itchy skin, hives and rashes.

As you can see, food intolerances quite commonly affect the digestive system, nervous system and immune systems of the body. The symptoms each individual gets can vary greatly, and we’ve covered the most common ones here today. In our next article, we will have a look at some of the less common and more unusual symptoms that can be caused by food intolerances. If you are suspecting that your body is reacting to foods, having our food intolerance test done is just a click away.


In summary, it’s fair to say that food intolerances are not easy things to figure out. A person can be suffering with them for years simply because of the variety and variance of symptoms that can occur. This makes it easy to attribute the symptoms to another condition, and miss the intolerance all together.

In this article we discuss the most common food intolerance symptoms, which occur regularly across the board. There are three key area’s of the body where symptoms most commonly occur, and they are:

1. The digestive system
2. The nervous system
3. The immune system


To help you potentially recognise these symptoms in yourself, we go into detail on the symptoms that regularly occur in each section.
If you find yourself dealing with any of the symptoms regularly, you may be living with an undiagnosed food intolerance. You can order the bio-resonance hair intolerance test HERE, and find out once and for all if food is the cause of your issues.

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