Please give more information about the Sulpher baths that an instructor mentions in one of his lectures. Is he referring to going to a hot springs containing sulpher, or to bathing at home and putting sulpher powder in the water? If the latter is what he was talking about, then please advise as to how much powder to use and if there is any cautions that need to be taken, such as related to frequency, rinsing off in the shower afterwards, etc. Thank you so much for your help.