酒精过敏为何酒精代谢能力中等

{"result":"\u4e2d","case_id":"249","prefix":null,"description":"\u9152\u7cbe\u4ee3\u8c22\u80fd\u529b","color":"#FFCC80","detail_url":"\/report2\/detail\/249"} 本人是过敏性体质，喝半杯不到的酒就很容易体表瘙痒起红疹、头晕。如果正如结果所说，酒精代谢能力中等，不至于会这样吧？