Large erythematous spots on the body from drinking alcohol without itching may be related to dilated capillaries or alcohol allergy. It is necessary to stop drinking alcohol, use medication to treat it, etc. 1. capillary dilatation: for some patients, may be in the long-term large amount of alcohol consumption, because of the role of alcohol, thus prompting the expansion of capillaries, which will appear on the body of the phenomenon of large erythema, but there is no itchy manifestations, can be given to stop drinking treatment, most of them will be improved on their own. 2. Alcohol allergy: this belongs to the external skin allergy symptoms, some patients may have erythema of the skin after drinking alcohol, and even serious itching and respiratory difficulties and other manifestations. In the acute stage, immediate oxygen and intramuscular injection of epinephrine can be given first aid treatment to avoid the emergence of anaphylactic shock and other serious consequences. Drinking alcohol on the body with large erythema without itching may also exist other causes, so it is recommended to regular hospitals, with a specialist doctor to do further examination, and then carry out treatment, do not blindly use drugs.