The inner thighs of small meatballs may be common warts, sweat pipe tumor, soft fibroid and other diseases caused. 1. common warts: common warts are caused by human papilloma virus infection, skin trauma, low immunity and other reasons may also trigger the disease. The main manifestation is the appearance of solid pimples on the skin, usually gray-brown or brown, with the development of the disease will gradually increase, can be seen in any part of the body. 2. Sweat duct tumor: it is a kind of benign tumor that involves the ducts of sweat glands, the cause of which is still unclear and may be related to genetic, endocrine, gender and other factors. The patients will have hemispherical or flat papules locally, which are yellowish, normal skin color and so on, and can occur in any part of the skin. 3. Soft fibroma: the etiology is not clear, may be related to obesity, infection and other factors. It is mainly manifested as higher than the skin proliferation, smooth surface, inelastic, can be seen in the groin, trunk and other places. If there is a situation that the inner thighs grow small meat grain, it is recommended to go to the regular hospital to consult the examination and clarify the cause of the disease.