Our expert says:
You really need to take him to a dermatologist as the over the counter products are not ideal to use on his soft skin. It is caused by a virus that is passed on from one person to another via direct contact. The fact that your son's is spreading may indicate that his immune system is a bit low, allowing the warts to multiply.
If you cant see a doctor right away ask for Vinok Liquid at your pharmacy (Or let them order it for you if they do not keep it). Apply this 4-5 per day to the affected area.
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