Detailed answer

Hair and scalp lymphoma, a type of non-Hodgkin's lymphoma, is a cancer of the lymphatic system. Allergic reactions to skincare products typically result in skin irritation or inflammation, but they do not cause lymphoma. Lymphomas are complex diseases with multifactorial causes, including genetic factors, immune system abnormalities, and viral infections. While it is essential to identify and avoid allergens that trigger skin allergies, there is no scientific evidence linking allergies to skincare products to the development of lymphoma on the hair and scalp.