What Is The Treatment For Swelling And Rashes On Penis?

i had torn some skin under my penis, to which i was prescribed a medicine(t-bact ointment), the skin is healing but now i have developed some swelling and rashes on my foreskin, my penis also feels itchy and is red.
i stopped using the ointment since 1 day but the swelling is still there, the affected area seems to be thick and some scar type of thing are visible.
please suggest what should i do???