What Causes Itchy Bumps On Under Arm And Spreading Towards Chest?

It started as red, itchy bumps on my underarm and later spread all over my chest, other arm, stomach, and groin areas. I have seen 5 doctors and none of them have to give me the right medication for this problem. The first Doctor told me it was a fungal infection and gave me Miconazole 2% which didn't work. The second Doctor told me it was Scabies and gave me Permethrin 5% and it didn't work either, it just made it worse and spread to other areas of my body. I went back to the same Doctor and told me to use it again, which only aggravated the situation. The Third Doctor told me it was a fungal infection as well and prescribed Ketoconazole 2% and it didn't work either. The forth Doctor didn't know what it was, but gave me Triamcinolone 1% and of course, didn't work. I am now on my fifth week of this ordeal and I don't know what to do. Blood tests were taken the last time I went to the Doctor and am awaiting the results. I am so frustrated, because this thing is not getting any better, just spreading more over my body.i used keto-b also.age 18.sex-male