There are a few small bags in the heel may be caused by friction leading to keratosis pilaris, allergic reactions, trauma and other reasons. 1. Keratosis pilaris: skin keratosis pilaris at the heel is mainly associated with long-term mechanical friction, pressure and other reasons, such as shoes are too tight, long-term walking or standing, etc., which causes excessive proliferation of the cuticle layer of the heel, and keratotic hyperplasia, which is often manifested as a yellow or yellowish skin bulge, and the number of which is often a number of them. 2. Allergic reaction: if the patient is exposed to allergens, stimulate the body to produce abnormal immune response, local skin may appear edema, skin localization of small bags, may also be accompanied by itching, pain and other symptoms. 3. Trauma: If the patient’s heel has been traumatized, it may lead to local scarring, resulting in local skin elevation, which can be manifested as a small bag-like elevation at the heel. There are several small bags in the heel may also be for other reasons, it is recommended to go to the regular hospital to identify the cause, and actively seek medical attention.