坐电梯头晕是怎么回事

健康咨询描述： 我坐电梯,电梯在升和降的那一刻,头很晕(迷糊),这是什么原因?是不是血压低的症状?我转圈时头也晕.(从小就这样)
第一次问题补充:(2007-12-12 21:54:48)那我转圈时头也晕.是怎么回事呢?为什么别人不呢?
第二次问题补充:(2007-12-13 21:07:33)我认为别人可能不像我,那芭蕾舞演员为什么不晕呢?我跳华尔兹、坐儿童玩的转盘都晕，怎么回事呢？                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
第三次问题补充:(2007-12-13 21:07:41)我认为别人可能不像我,那芭蕾舞演员为什么不晕呢?我跳华尔兹、坐儿童玩的转盘都晕，怎么回事呢？