I was taking a shower at a friends house once and after a few minutes in the shower, my whole body became really itch. My whole body became covered in tiny red bumps that were extremely itch and hard not to scratch. I had no clue what is was. I was freaking out and crying. But another thing about my friends house is that their only shower/bath had some kind of mildew or something on the wall... I'm not sure if it was that or the water that caused it to happen. But it happened there more then once an then like one time at my own house (my shower is clean though). I know it wasn't the soap or shampoo because I've never had a problem with those. But. Yeah. If anyone could explain this to me, it would help a lot.