Small toenails hurt when you touch them, and the possible causes are ingrown nails, onychomycosis, perinail warts and so on. 1. ingrown nails: if you trim your nails too deeply, resulting in abnormal growth of the subsequent nails, embedded in the surrounding nail bed, resulting in inflammation of the local tissues, which in turn manifests itself in the form of toenail pressure and pain, swelling, accompanied by erythema, and the appearance of small toenails that hurt when you touch them. 2. Nail groin infection: mostly due to Staphylococcus aureus and Streptococcus pyogenes infection. Its main manifestation is the redness, swelling and pain of the periungual tissues, so it can lead to pain when touching the little toenail. 3. Periungual warts: usually caused by the infection of human papilloma virus around the toenail or the nail bed, which often causes the destruction of the nail bed and deformation of the toenail, thus causing the symptoms of pain when the little toenail is pressed. All in all, the small toenail a touch of pain, it is recommended to go to the regular hospital in time, in the professional doctor’s guidance and active treatment.