Hair fall can happen due to many reasons. However, there are many reasons why hair loss may increase, including unhealthy living, variations in hormones or genes, and the constant struggle we experience.

I can see that scratching you due to a street dog can be a worrying issue for you. From your information, the scratch is not too deep, which may mean there is a low chance of infection. Watch out for any redness, swelling, or warmth around the area. First of all, wash the scratch using soap and water and then apply the antiseptic cream to the area to avoid any further infection. Watch the scratch for a few days, and if you spot any of the infection signs that are getting worse, like more pain, redness, or pus formation, it is better to go to a doctor. 

Itching on cheeks, hands, and back could be due to: 
- Dry skin
- Allergic reaction 
- Eczema or psoriasis 
- Bug bites or hives 
- Medication side effect. 

Try moisturizing, avoiding irritants, and OTC antihistamines. If symptoms persist, see a dermatologist. 

It seems like your skin is dry and lacks brightness; besides the pimple scars on your nose. Skin becomes dull due to lack of water in it. Spots get darker as a result of spots. Drink water and wash your face regularly using mild soap then apply lotion too. In addition, you can wear sunscreen to prevent the darkening of these patches further.

A painful lump near your anus could indicate­ perianal abscess. The absce­ss usually results from bacteria infecting small glands around the­ anus. It leads to redness, swe­lling, and throbbing pain. Antibiotics or a minor drainage procedure may be­ necessary. Kee­ping the area clean and dry aids he­aling. The condition involves a painful lump forming near your anus. It's typically cause­d by bacteria infecting small glands around the anus, le­ading to redness, swelling, and throbbing pain. Tre­ating it may require antibiotics or a minor procedure­ to drain the abscess. Maintaining cleanline­ss and dryness in the area can he­lp with healing.