What Causes Redness On The Penis?

well hello Doc, i am naman put up in delhi ,i have been sex active from past 1 year ,with one girl.,in starting i had unprotected sex as we both were virgin ,and then when we started usiing condem ,it started irritating me on penis ,however i had a cut there also ,,which is now healed by doc med.,but I HAVE A ISSUE LYKE MY PENIS HEAD HAS REDNESS FRM PAST 3 MNTHS AND A BIT IRRITAION .I AM JUST WORRIED ABOUT THAT REDENSS WHAT IS IT ? CAN YOU PLEASE TELL ME .THANKX