Hi, Your father has eosinophilia and tumor under skin . Eosinophils play two roles in your immune system, Destroying foreign substances and Regulating inflammation Eosinophilia occurs when either a large number of eosinophils are recruited to a specific site in your body or bone marrow produces too many eosinophils. This can be caused by a variety of conditions, diseases and factors, including Parasitic and fungal diseases Allergies, including to medications or food Adrenal conditions Skin disorders Toxins Autoimmune diseases Endocrine disorders Tumors Parasitic diseases and allergic reactions to medication are among the more common causes of eosinophilia. Hypereosinophilic syndrome tends to have an unknown cause or results from certain types of cancer, such as bone marrow or lymph node cancer You should consult general surgeon for evaluating the cause of tumor. Ideally he requires biopsy of the tumour under skin and based on histopathology report further treatment should be planned. Meantime you can give him eofil twice daily for 10 days Hope this will help you Regards Dr Sandhya Manorenj Neurologist Hi Tech city Hyderabad