A small circular bald spot on the scalp after popping a pimple is not uncommon, but if the area is sensitive and hair is falling out, please see a dermatologist to rule out infection or other underlying conditions.

It see­ms there's irritation from your podophyllin treatme­nt on your private parts. The burning and pee­ling skin could indicate a reaction. Stop using it right away. Gently wash the­ area with cool water and mild soap. Put calming aloe ve­ra cream to soothe irritation. 

Jock itch is a common problem and it can be quite annoying. It is caused by a fungus that grows in warm, wet places such as the groin. The signs include the groin area being red, itchy, and having a rash. For the treatment, you can use store-bought antifungal creams. You should also make sure to keep the area clean and dry as it will help healing faster.

It can cause burns and pain by touching the skin. Cold water makes it cold. Then take Ibuprofen or other painkiller plus cover it tightly with a bandage after wrapping it with moist and cool dressing.

You may be suffering from allergies, which can cause sneezing and chills despite warm weather. Allergens such as dust and strong odors, possibly from food, could trigger these symptoms. To manage this, avoid exposure to dust and pungent smells. Wearing a mask and keeping your living areas spotless can help. Over-the-counter antihistamines may offer relief. However, allergies are a complex condition, so it's important to steer clear of irritants.