Redness and itching on scrotum

[jburq]

Hi. I'm a 32 year old male. I have been in a warm climate for two months now for work. Have been on doxycycline for malaria prevention. After shaving my scrotum and penis I developed redness on the scrotum. It doesn't appear as a typical rash. There are no bumps or raised skin or edges. Red skin that is dry (initially flaky), itchy, warm to the touch, sensitive and skin appears thin. After a few days the redness spread to the penis and now the tip of my penis (penile ring) is red and sensitive. There is not discharge from my penis, although there is a very slight burning sensation while urinating. I have started applying anti-fungal and the itching seems to have subsided. Can you tell me what this is and what you think was the cause?

[jburq]

Just wanted to add: I recently had protected vaginal sex with an escort. Showered before and after and wore a condom. Could this be caused by an std?

[jburq]

Please help with any information you might have.