诊断学讲座(6) 恶心与呕吐

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恶心是一种特殊的主观感觉,是指想将胃内容物经口吐出。轻度恶心常表现为上腹部不适感、胀满感、对食物的厌恶感。严重的恶心,多伴有头晕、出汗、心率改变等植物神经紊乱的现象。恶心同时伴有呕吐动作,但无胃内容物自口吐出称为干呕。恶心常为“呕吐的先驱症状,但也有只有恶心而无呕吐,也有只有呕吐而并无恶心症状。
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