Toenail pain may be caused by trauma, onychomycosis, ingrown toenail syndrome and so on. 1. Trauma: If you wear unsuitable shoes for a long time, it will cause chronic extrusion and injury, resulting in bruising and pain in the nail plate. Or when the toes are accidentally hit by heavy objects, in addition to the redness, swelling and pain, it can also cause the nail to appear bruising and pain manifestations. 2. Nail groove inflammation: when wearing shoes too tight or excessive manicure, it can damage the epidermis, destroy the normal skin barrier, make it easier for bacteria to invade the nail groove, thus forming nail groove inflammation, resulting in swelling and pain in the nail groove and toenail, and in serious cases, even pus. 3. ingrown toenails: when the toes are extruded for a long time, it prompts the toenail to appear deformed, resulting in the growth of the toenail into the toe tissues, resulting in injury pain. It is recommended to pay attention to local cleanliness and hygiene, and keep the feet ventilated and dry. Toenail pain is also seen in other causes, if the symptoms are serious, it is recommended to actively go to the hospital, according to the different causes, the corresponding treatment, so as not to delay the condition.