Hard lumps on the soles of the feet that are painful to walk on may be caused by plantar warts, corns, trauma, and so on. 1. Plantar warts: this is a common disease, mainly caused by human papilloma virus infection. As a result of localized viral infections can lead to lump-like growths on the soles of the feet, and you will feel a hard lump on the soles of your feet when you walk. 2. Chicken eye: due to the shoes do not fit the feet or walking for a long time, it will cause serious friction on the soles of the feet, resulting in localized thickening of the stratum corneum, which will give rise to corns. With the development of the disease, it will also cause the accumulation of fluid to increase and deepen, resulting in restricted activities and walking difficulties. 3. Trauma: If the soles of the feet are accidentally traumatized for a long time without paying attention to reasonable treatment, it will lead to local blood stagnation, causing lumps on the soles of the feet and tingling sensation on the soles of the feet. In addition to the above factors, there are other possible causes, it is recommended to go to the hospital as soon as possible for examination, the doctor to clarify the cause of the disease, and then give targeted treatment.