What does it mean to have high eosinophils and how to lower them?

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The human body has an impressive defense mechanism. As soon as a foreign or harmful element is detected, different processes are activated to eliminate the threat as soon as possible. Depending on the type of risk, different defenders intervene. Within this intricate process, eosinophils stand out.

What are eosinophils, and what are the reasons for them to rise to abnormal levels? Let’s look at these and other details below.

What are eosinophils?

The renowned UCLA medical school defines eosinophils as a type of leukocyte. This means that they are part of the body’s defensive system. As scientific studies have shown, eosinophils are responsible for eliminating the causes of allergic reactions, asthma or parasites.

The work of eosinophils can be compared to that of a soldier, who eliminates the targets set by his superiors, in this case the body’s defense system. As it is an element that only acts in case of a threat, under normal conditions the amount should always be low, about 7% of the cells in the blood.

Causes of high eosinophils

Both the U.S. National Library of Medicine and the Mayo Clinic agree on the different causes of a considerable increase in eosinophils.

Allergic reactions

When there is the presence of an element to which the person is allergic, the immune system catalogs it as harmful. For this reason, the production of eosinophils increases, ready to defend the organism if necessary. Therefore, the allergic reaction is accompanied by eosinophilia, which is the increased number of eosinophils in the blood.

Parasitic infection

Parasites are one of the main targets of eosinophils. For this reason, in the presence of any of them, the body responds by increasing the number of defending elements. It is necessary to clarify that not in all cases of parasitic infection this increase will be seen, because eosinophils only act with certain parasites.

Parasites that settle in the tissues of organs and affect their composition, among others, are responsible for the body reacting with eosinophilia.


Cancer often significantly affects the number of eosinophils in the body. However, as with parasites, only some types of cancer lead the body to increase their number. Among these are the following.

  • Hodgkin’s lymphoma
  • Leukemia
  • Myeloproliferative neoplasm

A medical check-up allows the doctor to better evaluate the patient’s condition and condition. This can detect whether or not eosinophilia is present.


There is one cause that is among the most complex. It is the presence of eosinophils in high quantities, but in spite of different studies, it is not possible to find the origin of the condition. This condition appears mainly in men over 50 years of age. To be considered hypereosinophilia, the person must maintain this high level for more than 180 days.

Symptoms of high eosinophils

The number of eosinophils will depend largely on the degree of the condition. This in turn directly influences the symptoms that may occur. For example, a person whose eosinophil count is only slightly increased may experience very mild symptoms, although usually in this condition, no symptoms appear.

In the case of persons whose eosinophils increase considerably, symptoms will appear without fail. The number and location of eosinophils depends on the organ that is being attacked by the disease, be it allergy, parasitic infection or cancer. Some of the most common symptoms are the following.

  • Skin alterations. Rashes and similar reactions may be seen when eosinophilia occurs on the skin.
  • Respiratory conditions. When the lungs have more eosinophils than normal, the person may have episodes where it is hard to breathe.
  • Heart problems. If the heart is the organ involved, then you may have extreme tiredness and even trouble breathing.
  • Stomach conditions. When the stomach or esophagus suffers from this condition, there is usually pain in that area, and it can reach the pharynx

how to lower high eosinophils?

The treatment to reduce the number of eosinophils is to direct attention to the cause. To do this, the physician must perform a complete evaluation of the patient. It is very important that this includes any medications that have been taken recently. Once the picture is complete, action can be taken. By eliminating the cause, eosinophil levels will decrease.

Drugs, such as corticosteroids, can also be given if the physician sees fit. Sometimes eosinophilia is caused by the ingestion of some medication; if this is the case, the intake of the medication should be stopped immediately.

In extreme situations, such as when the number of eosinophils is affecting the heart or lungs, drastic measures should be taken. This may include chemotherapy or surgery. The health specialist must analyze the whole situation in order to make the best decision

When there is hypereosinophilia

The situation is different when the appearance of eosinophils does not have a specific cause. Due to the risk of losing your life if you do not have treatment, it is essential that, when the symptoms mentioned above appear, you go to a doctor.

The health specialist should examine the patient and determine which treatment is best. In general, the following are prescribed steroid drugs such as prednisone. In the case of other people, the treatment to follow is the use of chemotherapy.

The study on the Practical Management of Eosinophilia, carried out by health professionals, highlights the proper way to treat a patient with eosinophilia. Emphasis is also placed on how to act when hypereosinophilia is present.

Eosinophils play a very important role, as long as they are kept at the appropriate levels. That is why it is always advisable to have at least one medical check-up per year.

German Fuertes Otero
German Fuertes Oterohttps://www.google.com/search?kgmid=/g/11p5t5jsss
CEO at PharmaSalud.net. M.D. from Stanford Medicine: Stanford, California, US, M.Sc. from University of Cambridge: Cambridge, Cambridgeshire, UK and University of Oxford: Oxford, Oxfordshire, UK. PhD at Harvard University Harvard Catalyst: Cambridge, MA, US.

Aunque pueda contener afirmaciones, datos o apuntes procedentes de instituciones o profesionales sanitarios y la información contenida en PharmaSalud esté redactada por profesionales en medicina, recomendamos al lector que cualquier duda relacionada con la salud sea consultada con un profesional del ámbito sanitario.

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