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High eosinophils


The leukocytes or white blood cells are a group of heterogeneous cells present in the blood to give immune response to the occurrence of foreign substances or antigens in the body. In other words, leukocytes are the cells in charge of defending our body against the aggression of different diseases. Having high eosinophils is not a disease, but the consequence of some process that is taking place in our body.

Within the various white blood cells, there are granular cells known as eosinophils , with their own specific characteristics and particular functions.

Unlike other leukocytes that are generated in lymphatic tissue, eosinophils are developed exclusively in the bone marrow. After going through a maturation process that lasts around eight days, they take around twelve hours to reach their destination tissue (anywhere in the body), where they will remain for up to a couple of weeks, performing their protective functions.

When an antigen has entered the body, eosinophils come to neutralize its harmful consequences. They fulfill their main role during inflammatory processes , especially when these are due to allergic-type disorders . However, their role goes beyond acting when there are allergies, as they also perform important functions in the fight against parasitic, viral and bacterial infections. In fact, it is characteristic to observe sudden increases in the concentration of eosinophils in the blood when the body fights against an infection.

Normal blood eosinophil values

Like any other element that is part of the highly complex human body, eosinophils must be kept within reference parameters that mark a balance, ensuring good health. Typically, these cells account for around 1-6 percent of total white blood cells . If we translate the percentage into numbers, an eosinophil count should never exceed about 350 for each microliter of blood.


When these cells appear in excessively high amounts in the blood (due to exaggerated reactions to the appearance of a medical problem, usually an allergy or asthma ), this abundance can have negative consequences for people’s health, as these cells release certain substances that are potentially toxic to the body. In fact, it is common for a healthcare professional to request an eosinophil count, as this will be able to help them understand what is causing the patient’s problem.

The presence of between 400-450 eosinophils per microliter of blood is considered high, and this amount should never be exceeded: it can be a symptom of diseases of a very diverse nature.

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What happens when we have high eosinophils

The medical term for high eosinophils in your bloodstream is eosinophilia . In numbers, finding more than 500 eosinophils per microliter of blood is generally considered eosinophilia for adults. When high levels occur locally, due to infection or inflammation, this is known as tissue eosinophilia . Likewise, when the eosinophil count exceeds 1500 per microliter of blood, and this problem persists over several months, we are faced with a hypereosinophilic syndrome .

Typical symptoms of eosinophilia are usually wheezing , coughing, and breathing difficulties . Other times, they can cause abdominal pain and diarrhea . Less common are night sweats , skin rashes, and weight loss . Since these symptoms are quite typical, they do not always indicate the presence of this disease. However, it is always advisable to go to the doctor when you are suffering from any of these signs.

Causes and risks of high eosinophils

Eosinophilia usually occurs in the presence of other medical problems, such as allergies , that increase the incidence of eosinophils. Likewise, it is also typical to find it when there are asthma or hay fever problems . Diseases such as vasculitis , cirrhosis , and various lung , skin and certain tumors also tend to trigger abnormally high amounts of eosinophils in the blood. In underdeveloped countries, meanwhile, parasitic infectionsthey are the main causes of high eosinophils. These risk factors may also be related to the side effects of certain medications , prescribed to treat these pathologies.

The difficulties that occur in the patient with eosinophilia are essentially the same as the underlying condition that triggers it: if the underlying condition is asthma, the patient will suffer from difficulty breathing and wheezing, whereas if the trigger has been a parasite, fever, abdominal pain and skin rash will be observed in the infected patient.

Treatment of eosinophilia

Treatment of eosinophilia is usually directed at the underlying cause . However, for less severe cases, the use of corticosteroids is usually used , which are very effective in reducing the amount of eosinophils in the blood in allergy processes.

For more severe forms of eosinophilia, when vital organs are affected, the use of more aggressive medications, such as anticoagulant therapies or chemotherapeutic agents , is often required .

Finally, in extreme cases, it may be necessary to resort to surgery to restore the normal functions of the affected organs.


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Hello Readers, I am Nikki Bella a Psychology student. I have always been concerned about human behavior and the mental processes that lead us to act and think the way we do. My collaboration as an editor in the psychology area of ​​Well Being Pole has allowed me to investigate further and expand my knowledge in the field of mental health; I have also acquired great knowledge about physical health and well-being, two fundamental bases that are directly related and are part of all mental health.

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