I'm a teen, i wakeup about 30 minutes after i sleep & findmyself masturbating against my bed. this is disgusting. how do i medically stop? any medicine?

Nocturnal Sexuality: This is a common and normal experience for a teenager. I doubt that there is anything here to stop you from doing this unless you are relieving your sexual urges through the normal and common practice known as masturbation. Being a sexual being is part of the human condition. The is no medical or health consequences to becoming sexual. There are plenty of negative health consequences to not sex.

Sexsomnia: You have what is called a sexsomnia. Sexsomnia is considered a type of non-rapid eye movement sleep (nrem) parasomnia. Sexsomniacs do not remember the acts that they perform while they are asleep. Please see the reference at: en.Wikipedia.Org/wiki/sleep_sex drinking alcohol, taking recreational drugs, suffering sleep deprivation, and experiencing stress are triggers. Avoid them. If apnea, treat.