Foot nail cap pain at the touch may be embedded nail, inguinitis and other diseases. 1. ingrown nail: the cause is mostly related to improper toenail trimming, mechanical injury, nail deformity and other factors, the patient will appear nail edge inserted into the soft tissue around the nail, thus causing redness, swelling, pain and other symptoms. 2. Nail groove inflammation: the etiology is mainly due to tiny trauma around the nail or embedded nail after and pathogenic microbial infections and other factors, the patient is mainly manifested in the peri-nail tissue swelling, pain and other symptoms. There are many reasons that lead to pain when touching the toenail cover, and it is recommended that patients go to the hospital to clarify the cause of the disease.