My scalp started itching really badly and been going on like that for several months, I tried different shampoos but none helped. Since I scuba dive a lot and often go to 45 meters me and my friends thought it cant be lice because it wouldnt survive at that depth (under such pressure). So I went to a pharmacy and they gave me a shampoo for some sort of dermatitis. It didnt help. Then I did a technical diving course where I went to 60 meters and stayed there for 20 minutes 2 times a day, 3 days in a row. After this the itiching vanished. Its been couple of months now and my scalp was feeling fine until yesterday, it started to itch a little, today its worse.
Anyone has any idea what it could be and what kind of medicine do I need?
Im in Thailand, and where I am there's no clinics where I can go to find out what it is so I just have to guess, so your feedback is really appreciated. Thanks