Hi doctor. I have been married for 4 years, faithful to my wife. Yesterday, after we had sex, which we had not had for a while due to the birth of our baby, I noticed a little tear on the stem of my penis. During the maternity period, I do masturbate from time to time but not excessivly. It is dry winter weather here. Thanks.
Thanks for asking in Chat Doctor forum Small cuts in the foreskin and tear of frenulum is very common with Chat Doctor.  So, please maintain hygiene and lubrication to avoid this. If not relieved then visit a doctor for physical examination and further management. All the best.