 [ Symptoms ] when you lose weight only when your on your period and then gain it back what does that mean any other time u can not [ Disease ] to drink or swim in it if you are talking about drinking cold water then i have to tell you that ice cold water is my favorite drink the colder the better drinking cold water is not bad for you i am not a big fan of swimming in cold water but some people love it as long as you are not immersed to the point of getting hypothermia you may find it exhilarating i find it unbearable so swimming in cold water is not bad if you can stand it