Internal heat and external cold manifests as heat inside the body but cold outside, with specific symptoms such as cold limbs, upset, dry mouth and bitter mouth. Cold limbs: patients with internal heat and external cold will show the symptom of cold limbs due to the state of cold on the surface of the body, generally the more serious the internal heat, the more obvious the symptom of cold limbs. Disturbed: internal heat and external cold patients due to internal dryness and heat, will show the symptoms of disturbed, at the same time due to irritability will also be accompanied by like to drink cold water and insomnia symptoms. Dry mouth and bitter mouth: internal heat and external cold patients due to the different nature of the internal and external, resulting in dry mouth and bitter mouth symptoms, accompanied by dry stools, yellow urine and other symptoms. When patients show symptoms of internal heat and external cold, it is recommended to go to the hospital in time, under the guidance of the doctor’s treatment.