If a patient has hot feet in summer, the evidence should be identified from both Chinese medicine and Western medicine. From the perspective of Chinese medicine, this is a fire evidence, usually due to the patient’s lower jiao fire, which causes irritable heat in the heart of the feet, due to excessive liver fire and excessive lung fire. From the perspective of Western medicine, the most common factor is the tendency to suffer from heat stroke in summer, especially heat exhaustion, heat cramps and pyrexia, when the clinical symptom of irritable heat in the heart of the feet occurs. Patients with hyperthyroidism or hyperadrenalism in summer will have clinical symptoms of hot and bothered feet. Patients with peripheral neuritis, such as diabetes mellitus combined with peripheral neuritis of the extremities, are prone to fever in the heart of the feet, especially in summer, and patients with gouty arthritis attacks may also experience significant irritation of the soles of the feet and the heart of the feet.