Hard bumps on the soles of the feet may be plantar calluses, corns or plantar warts. You can use to reduce friction, medication such as salicylic acid ointment, fluorouracil ointment and so on. 1. callus: commonly known as “callus”, manifested as wax yellow, hard texture, flat or slightly elevated keratinous hypertrophy, generally limited. Early symptoms are not obvious, you can choose comfortable shoes and socks, reduce friction, most of the symptoms can gradually recede. 2. Corns: local long-term pressure and friction caused by limited, cone-shaped keratosis, symptoms manifested as limited keratosis, the center of the inverted cone-shaped keratinous plugs embedded in the dermis, standing or walking caused pain. Salicylic acid ointment can be used to soften the keratin until it falls off. 3. Plantar warts: These are typically tawny or yellowish keratinized plaques or flat papules with a rough, uneven surface, a slightly concave center, and a thickened keratin ring around the edges, which can be painful when pressed. They can be treated with fluorouracil ointment. If the symptoms of hard bumps on the soles of the feet continue to be unrelieved, it is recommended to go to the regular hospital for treatment, the above drugs should be used in accordance with medical advice.