Potassium permanganate solution can be sprayed on the glans, but it needs to be diluted before spraying. If the concentration is too high, it may cause chemical burns to the local skin mucosa. The general dilution ratio is about 1:500, which can inhibit the growth of local bacteria, but not for trichomonas or fungi. At the same time, you need to go to the hospital for examination and, if necessary, other drugs to treat the local infection. Cleaning time should not be too long, and in principle, continuous spraying is not recommended for more than 14 days. After spraying, it is sufficient to use water for local cleaning after an interval of about 15-30 minutes. Also note that potassium permanganate solution should not be applied to the urethral mucosa, that is, not sprayed into the urethra, otherwise it can cause burns to the urethral mucosa. In normal life, you need to maintain local cleanliness and hygiene, men need to turn up the foreskin after spraying around the glans and coronal groove.