Pain on the inside of the little toe may be caused by nail groin infection, gout, corns and so on. 1. Nail groove inflammation: fungal infections such as Candida albicans can attack the nail tissue, disrupting the normal skin barrier and triggering an infection, leading to inflammation and the symptom of pain in the inner side of the little toe. 2. Gout: a variety of factors can lead to purine metabolism disorder in the body, uric acid production is too much, the concentration of uric acid in the blood is elevated, it will form sodium urate deposition, resulting in joint pain, the inner side of the little toe will also appear pain. 3. corns: the skin on the inside of the little toe is squeezed for a long time, or friction will occur keratosis, appearing clear boundaries, yellowish or dark yellow, conical keratinous plugs, there will be pain. The inner side of the little toe pain may also be seen in joint injury, rheumatoid arthritis and other diseases, if the symptoms of the inner side of the little toe pain, persistent and unrelieved, need to consult a doctor in a timely manner to clarify the cause of targeted treatment.