Am Itchy On The Head Of Penis. Used Canesten Cream. Had Std/sti Checked, Was Clear. Had Herpes. Skin Is Tight. Shedding. Suggestions

Hello
Last week I became slightly itchy at the head of my penis and assumed it was thrush, I used some canesten cream for a couple of days but I did notice a few red marks on the shaft of the penis, not raised or sore and I had a sti/std check up in November and the results were clear, I also had a Herpies scare last year but came back clear. Anyway I ended up going camping and I forgot to take the cream with me. The skin became rather tight and became dry and started to shred almost like a snake skin so I ended up using tea tree oil to stop the itching. The next day I came out in sores and I also came out in a few black marks which have now come off due to the shredding of my skin