Headaches due to alcohol consumption are caused by various causes. Excessive drinking with too high amounts leads to intoxication and as a consequence to a hangover the next day. Excessive amounts of fusel oil and acetaldehyde in wine also favour the occurrence. Other causes are excessive loss of fluids and minerals. The body dehydrates strongly due to the alcohol. Under certain circumstances, more liquid is excreted than the amount drunk. Important minerals such as magnesium are lost in the process. Even if alcohol consumption is low, allergy sufferers can suffer headaches or migraines due to the histamine and tyramine present in red wine. See also under alcoholism.