Itchy bumps on the feet may be caused by eczema as well as contact dermatitis, insect bite dermatitis and other diseases. 1. Eczema: its pathogenic factors include genetics, environment, immunity, etc., the patient’s head and face, hands and feet and other places of the skin may appear pimples, itching and so on. 2. Contact dermatitis: its onset factors may be animal, plant and chemical exogenous substances in contact with the skin, causing skin allergies. It is characterized by pinpoint-sized pimples, itching, and other symptoms, and can occur on all parts of the body surface. 3. insect bite dermatitis: the cause of its formation and insect bites and other factors, the patient’s skin will appear red, swollen, erythema, blisters and other symptoms, often accompanied by itching. The cause of foot long a lot of small bumps very itchy reasons are more, it is recommended that the patient, clear cause of the disease.