It is hard to diagnose your balding without a professional examination. If you are worried about hair loss, you should visit a dermatologist who is a specialist in hairs loss problems. They can analyze your condition and give you optimal care.
 

Sunburn is one of the reasons it can happen. Prolonged exposure to the sun can cause your skin to become dark. So, you can apply a cream with aloe vera or cucumber to cuddle your skin. Another recommendation is to wear sunblock when you are going outdoors to keep your face protected.

It depends on the extent of the damage. If the wound is mild, cleaning it with a mild soap and water will promote healing. For serious cases, you should head to a dermatologist or a plastic surgeon with expertise in breast reconstruction. It is also wise to seek medical assistance to avoid possible complications.
 

It seems you are facing a heat rash which is a common condition. Your skin gets too hot due to the sun and it can make your skin red, itchy, and throbbing. After a time, you should avoid wearing clothes that are too tight. Make sure to wear cool, loose-fitting clothes. Moreover, always keep below clean and dry when there is a chance of heat rash. Calamine lotion can also be a good option to use to relieve the burning skin. Drinking enough water is important.