Your Asian ancestry is most likely the culprit. Numerous studies have been conducted into the observed predominance of alcohol allergic reaction in Asians (especially men). The studies are related to similar findings in Native Americans, who, by genetic reference are related to Asian populations. An enzyme deficiency, labeled ALDH2, caused by a mutant gene (ALDH2*2) appears to be involved. The most commonly observed phenomenan is flushing of the face, but other allergic reactions are also displayed. Ironically, the observation of low alcoholism among this same population may be related to the enzyme deficiency...