Do I have a painless bump under my elbow?

She might be allergic to crabs. Sometimes, our bodies come back to certain foods in the wrong way. Symptoms can be throat itching and eye swelling. In this case, she must not eat crab and other shellfish. In case of severe symptoms, she should go to the hospital immediately. Allergies can be life-threatening, so it's necessary to exercise caution.

Face acne can be addressed with over-the-counter topical remedies containing benzoyl peroxide or salicylic acid, and prescription medicines such as topical retinoids or oral antibiotics. It is recommended to visit a dermatologist who deals with skin diseases, so as to find out the best treatment for the type of acne you have.
 

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 appears that you are suffering from heat-induced Urticaria. This condition is defined by the occurrence of hives on skin along with severe itching following contact with heat. I would recommend consulting a dermatologist with expertise in skin diseases. They could suggest an appropriate treatment plan to provide symptom relief.

You likely have a fungus on your testicle. The symptoms you have mentioned like the peeling of skin, white substance, and smell, along with itching, appear to be a normal fungal infection. They may be caused by the lack of hygiene or tight clothes. This can be solved by keeping a dry and clean environment, wearing loose clothes, and using a pharmacist-recommended antifungal cream.

To help the wound heal, ensure that you keep it clean and dry, wash the area gently with some mild soap and water then dry. Any rough movements which might disrupt the stitches should be avoided. Consult with Your Doctor on the right type of vitamin C use, usually white because colored ones could have added ingredients. Should there be signs like increased pain, redness, swelling, or pus, then do seek medical Help immediately as this could mean infection.