There are more reasons for toenail pain, which may be related to recent trauma, local inflammation and other factors. The symptoms of pain can be effectively relieved by treating the symptoms according to different causes. The following are the main reasons to consider when painful symptoms occur in toenails: 1. Trauma: Chronic extrusion and injury caused by wearing unsuitable shoes for a long time in some people can lead to nail plate bruising and pain. In addition, such as toes and toenails accidentally kicked or hit by heavy objects, usually local redness and swelling pain, that is, injury leads to local inflammatory reaction, painful symptoms; 2, nail groinitis: usually refers to the toenails on both sides of the nail groove inflammation, foot nail groinitis is mostly in the wearing of shoes too tight, excessive nail trimming led to epidermal damage, the normal skin barrier is destroyed, causing bacterial invasion of the nail groove, in the long run appear Bacterial infection. It is usually characterized by redness, swelling, and pain in the nail and toenail, and in severe cases, pus may be discharged from the nail groove. If the patient has a localized abscess, the doctor needs to cut the abscess open and draw out the deep purulent secretions in order to accelerate the healing of the abscess; 3. neuritis: neuritis, also known as peripheral neuritis, mainly manifests as symmetrical sensation (pain, numbness, allergy, etc.) and movement disorders in the distal extremities of the limbs. It may be caused by poisoning, infection, nutritional and metabolic disorders. When there is an increase in the accumulation of disorders in the area of innervation, such as the accumulation of motor-sensory autonomic disorders in the foot, neuritis of the foot may occur, resulting in toenail pain. Treatment should firstly lift the cause and give B vitamins, dibazol, cytarabine and other medications as prescribed by the doctor; 4. Postherpetic neuralgia: If there is a history of herpes zoster, pain in the unilateral toenail or pain in a few 1-2 toenails may be postherpetic neuralgia formed after herpes zoster has healed, leading to sensitivity and painful symptoms of the peripheral nerves, which may manifest as limited spontaneous pain. In daily life, you should pay attention to local cleanliness and hygiene, often wash your feet with warm water, socks and shoes can be exposed to the sun and kept ventilated and dry. If the above symptoms occur, it is recommended to actively consult a dermatologist for consultation and treatment, and to deal with different causes accordingly.