A long bag on the foot without pain or itching may be related to callus, metatarsal warts, dermatofibroma and other diseases. 1. callus: due to long-term friction and pressure caused by the thickening of the skin stratum corneum on the feet, which can lead to thickening of the skin in the affected area, roughness, the formation of hard raised lumps, i.e. callus. Because of the roughness of the callus, it usually does not feel sensitive, painless and itchy. 2. Plantar warts: If the feet are infected by the human papilloma virus, it can lead to small pimples on the feet, which gradually increase in size and can appear as rough patches, and some patients do not have any symptoms. 3. Dermatofibroma: It is a reactive proliferation of fibroblasts triggered by tiny skin injuries, which can appear as hard yellow-brown or reddish pimples or nodules on the feet, and is usually painless and itchy. If a bag grows on the foot without pain or itching, you should go to the regular hospital in time to find out the cause of the disease, and choose the appropriate method of treatment under the guidance of a professional doctor.