Yes, you can undergo a Keratin hair treatment to help reduce hair fall. Keratin treatments are designed to help strengthen and nourish the hair and reduce breakage. However, it is important to keep in mind that Keratin treatments should not be used as a primary treatment for hair loss. You should speak to your doctor to determine the underlying cause of your hair loss and the best treatment options for you.

Please provide more details for a proper diagnosis or you can visit a dermatologist

As per your symptoms it would appear that you are suffering from acne vulgaris. This condition may also lead to pimples, acne and dryness on the face. This may also be associated with the dandruff and hair fall. I suggest that you consult a dermatologist who will offer the right diagnosis and treatment protocol.

A common cause of dandruff is yeast which lives on everybody’s skin. Sometimes, if you’re using certain shampoos and they’re not working it’s possibly because your scalp needs something else. Try shampoo with an ingredient such as ketoconazole or salicylic acid in it and be sure to massage this into your head. Doing so should help decrease both the amount of flakes produced by the dandruff and also provide relief from irritation caused by dryness.

You may have gotten bitten by an insect, which your body doesn't like at all. Sometimes, such bites can result in skin all lumpy and itchy, as you have mentioned. If your PT INR levels are high, it indicates that your blood may take a longer time to clot. You should apply some anti-itch cream on the bite and also visit the physician to do your PT INR check. They could need to adjust your medicine. 

Stretch marks are common and appear when the skin is stretched significantly. They can be purple, red, or silver, depending on how long they’ve been there. Causes include rapid growth, weight changes, and pregnancy. Solutions include using moisturizers, and creams, and maintaining a healthy weight. While they usually fade over time, they may not completely disappear.