How can I stop extreme hair fall?

It might be that your underarms have become darker due to some other reason. So, it is best to consult an experienced dermatologist. The dermatologist may examine your condition to know the exact cause of it and determine a suitable treatment accordingly. 

When certain allergies occur, body parts tend to swell. This might have been caused by contact with something like a plant or chemical that does not agree with you. Ensure the affected area is washed properly. To reduce the swelling, you can use an antihistamine. Seek immediate medical attention if things get worse or if you find it hard to breathe.

From what you are telling me, a cat must have bitten you. And even though it didn't bleed, you saw a burning sensation and a red dot after the event. This is a possible result of bacteria from the cat's mouth. It is important to wash the area with soap and water. Check for any swelling, pain, or redness. If you see anything out of the ordinary, don't hesitate to see a doctor.

You might be dealing with a common issue called acne. The back can easily get acne due to things like friction from clothes, sweating, or clogged hair follicles. To treat these spots, keep the area clean and dry, wear loose clothing, and use over-the-counter acne treatments with benzoyl peroxide or salicylic acid.

Skin darkening is a typical phenomenon; it could be as a result of different causes like solar exposure or genetic condition. Dark skin tends to become discolored. To lighten your skin, try staying away from the sun, using mild skin care products, and eating healthy foods are the right methods. In addition to this, drinking plenty of water and sufficient sleep also help make your skin seem fairer.

You may have hives. Hive­s are caused when some­thing bothers your body. This something can be food, plant, or dust. Whe­n your body dislikes these things, it make­s hives. The hives move­ around your body and come and go. To feel be­tter with hives, stay away from things that bother you. You can take­ medicine to stop the itching. Drink lots of wate­r and get plenty of rest.