Elevated skin temperature is commonly associated with erythematous limb pain. Erythermalgia is a disease caused by excessive vasodilatation of the blood vessels in the extremities, which is characterized by paroxysmal redness of the extremities, increased skin temperature and burning pain in a warm environment. Primary cases are more common. The disease is rare. Most patients are children or 40 years old. Overseas reports show that there are more male patients than female patients, about 2/1. However, among the 433 cases reported in Guangzhou, young females accounted for 92.86% of the cases, and the male/female ratio was 1/13. The disease has a rapid onset, and attacks are often triggered or aggravated by dropping the limb, standing or exercising in a warm environment. Localized skin temperature exceeding the critical temperature often causes an attack, and the attack is often more severe at night than during the day. Seizures are characterized by symmetrical, paroxysmal severe pain in both feet, which is mostly burning, occasionally tingling or swelling. The skin is flushed and congested, and the skin temperature increases with sweating. The dorsalis pedis and posterior tibial artery pulsations are enhanced. Cold compresses, elevation of the affected limb or exposing the foot to the blanket, and local temperatures below the critical temperature may relieve the attack and return the skin color to normal. The pain is usually confined to the bunions and toes of the foot, and less commonly to the corresponding parts of the hand. Each attack lasts a few minutes or even a few hours and is occasionally accompanied by localized edema. Between episodes, mild numbness or pain often remains in the extremities, but not with neurotrophic disorders such as ulcers or gangrene. Prevention of elevated skin temperature patients are advised to wear porous sandals, the foot should not be covered at night when sleeping, and the foot should be avoided as much as possible to be exposed to warm environment, especially dry heat. People with severe attacks can move to live in places where the temperature does not reach below the critical temperature for causing pain attacks. However, it is also not advisable to use ice or ice water to reduce local temperature to relieve the attack, so as not to damage the blood vessels and peripheral nerves of the extremities, but to make the attack continue or aggravate. In terms of diet, it is advisable to eat foods containing vitamin A, foods containing vitamin B, foods containing vitamin C, calcium and iron, plain fruits and so on, and clear and moist products. The following foods are recommended to eat in moderation: 1, carrot puree Containing vitamin A, belonging to a particularly nutritious vegetable green and yellow vegetables can be chosen. 2, sesame seeds Containing vitamin B, calcium and iron. 2, sesame seeds Containing vitamin B. To relieve the skin temperature rises very good effect, fresh milk, wheat germ and other foods can choose. 3, red dates Containing vitamin A. Erythema limb pain patients have obvious nutritional effects, it is recommended that a few grains per day, porridge to take.