No estoy seguro de qué son estas líneas después de 30 días de tratamiento para la sarna

I have been treated from scabies one month ago, no itching at night, no new burrows on my hands, but 2 days ago I noticed these things on my private parts, does this means a reinfestation or anything else knowing that they are itchy? just to add, I am 22 years old male and I have not had sex in my life at all. I am so worried

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any help please?