Can I prevent red patches on penis post PEP?

It is possible that the black vertical line on the boy's thumb nail is a result of a melanonychia striata, which is a linear nail melanin pigmentation. It is relatively common in children and is generally harmless. However, it is important to have it evaluated by a doctor, especially if it is growing, to rule out any underlying medical conditions.

Yes you can have budget creams in the form of moisturizer, pigment reduction cream containing polyhydroxy acids, and a good sunscreen with both UVA as well as UVB protection. For the scar, you can use antiscar gel containing silicon

This will then require a medical specialist to assess the swelling and find out what causes it. It is recommended to visit a dermatologist in such cases, who can detect and treat skin diseases. However, do not attempt self diagnosis

You may have an infection in the stitches on your hand. When pus comes out, it indicates that there is probably bacteria which is causing the infection. This might have occurred if the wound was not kept clean. If there was a large red lump previously, it could have been an abscess. It’s crucial to have this seen by medical professional because, without proper care, things like these can worsen.

You probably deve­loped athlete's foot. This fungal infe­ction grows between toe­s, warm and moist spots. Peeling skin signifies it. Cuts are­ another symptom. To heal it, kee­p your feet dry, use cle­an socks daily, and apply antifungal cream. Clearing it take­s time. Be patient. Stick with the­ treatment regime­n.