Eosinophil percentage 7 may be caused by allergy, dermatitis, eczema and so on. 1. Allergy: allergy may be related to contact with allergens, allergens into the human body may make the allergens and the body antibodies to produce a reaction, the body appears to have an abnormal immune system, which will secrete excessive eosinophils. There may be symptoms such as pale edema of the nasal mucosa, conjunctival congestion, chest tightness, etc. Some patients may have a high eosinophil percentage of 7. 2. Dermatitis: dermatitis may be related to chronic infection foci, endocrine and metabolic changes, etc. Abnormal metabolism will lead to abnormal secretion of eosinophils. Symptoms such as papules, blisters, exudation, etc. may occur, as well as eosinophil percentage 7. 3. Eczema: Eczema may be associated with chronic digestive diseases, endocrine dysfunction, infections, etc. Endocrine abnormalities can cause eosinophil synthesis abnormalities, which can lead to eosinophil percentage 7 on the high side. If the eosinophil percentage of 7 test results, we should go to the hospital to complete the relevant examination, to clarify the cause of the disease, for targeted treatment.