The reasons for drinking red wine headache are as follows: 1, red wine is rich in ethanol, ethanol in the body is rapidly decomposed into acetaldehyde, acetaldehyde has the effect of expanding the capillaries in the head, which will increase the permeability of the capillaries in the head, open the arterial and venous short-circuits and direct pathways, and therefore lead to dizziness and headache. 2, acetaldehyde is released in the body at the same time will also activate the body’s inflammation factor, which will promote the human body to release the inflammatory factor, inflammation factor usually has bradykinin, leukotriene and prostaglandins. Inflammatory factors usually have bradykinin, leukotriene and prostaglandin, the above substances will make the head, especially the scalp and other clinical symptoms and clinical response of acidity and numbness, swelling and pain. 3, drinking red wine is particularly easy to expand the capillaries, especially expansion of capillary distribution of the head and the scalp, expansion of the scalp capillaries, it will lead to a further aggravation of the headache.