The foreskin tore at the connection point and it hurts very much. How to treat it?

Patient's question:

My foreskin tore at the connection point with the outer layer, it's extremely painful. How can I heal it? {It took a long time to heal, but it broke again during sex} My partner's vagina is always dry during sex, and we've done enough foreplay. First follow-up question: My partner's vagina is always dry during sex, and we've done enough foreplay. Second follow-up question: 25 years old

Doctor's answer:

Hello: Your condition can be treated with an external wash using potassium permanganate at a concentration of 1:5000. Please pay attention to hygiene care and avoid sexual activity until fully recovered.