Guichet: thermal baths: relaxation, health... and precautions

Hot tubs, saunas, hammams or Jacuzzis, many of us are seduced. It's in season, and the activity is reputed to be good for your health. But is it right for everyone? What does heat do to our bodies? Hammam or sauna? Should I immerse myself in cold water after sweating? Can my young child come with me? When is a spa treatment medically indicated? What does it consist of, and is it reimbursed by LAMAL?