<s>[INST] i have skin disease on my groin area and its on both thighs and testicles and most of the penis . and keep on spreading its not itchy its like some kind of fungus on my skin if i put little water and rub it it will disappear . it s  color is tan/ash/white ... my skin is dark so first appearance is  white when i rub it the white dust so called fungus rip of the skin what is this its really embarrassing.. before this skin disease I had itchy rash I think its tinea curis (jockey rash)  and i used betamethasone cream and it was cured [/INST] Thanks for contacting Chat Doctor with your health concerns and questions. I am sorry to hear that you continue to have itching a rash in the groin area. You say the rash is light color and makes the skin peel when rubbed. This could be Tina courts again but from another form of fungus. There are several fungi that can cause Tina. In my practice I have my patients use Inaction or Tamil to cure the infection. I avoid using dexamethasone as this may actually cause the fungal infection to worsen, and it is also a powerful steroid that can cause serious skin changes in the groin area. So I recommend that you stop dexamethasone and try Tamil or Inaction. If these measures don't help then seek medical attention for more powerful antifungal treatments. Hope this answers your question. Please contact us again with your medical concerns and questions </s>