It's like a burn I felt it for about 2 days and it's itchy, can someone here know what this is? than

some parts of the skin of my penis is itchy, can someone know what this is? last week when I had sex with my girlfriend I put some alcohol around my penis and it felt like a burn but after a week this showed upimage

NEVER apply alcohol to penile skin! You have severely damaged you skin on the head and foreskin of your penis. Over a period of time this may heal on its own - but that could take anywhere between 3 and 6 months +.
Not masturbating or having sex will greatly help the healing process - try to abstain from both for as long as you can, and I mean months rather than days or weeks.
If possible go see a Dermatologist or a doctor to get an appropriate cream or ointment to help your skin to heal …

i agree u have burnt your skin