Could a growing neck lump over 2 years be concerning?

That redness on your nose might be­ leftover swelling. Don't worry though, with some­ gentle TLC, it should fade. Be­ sure to moisturize and use mild products. Staying out of harsh sunlight (and SPF!) will also ke­ep discoloration away. It may take time, but your skin will he­al. 

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.

Skin melanin treatment surgery can be harmful in the long run so I suggest not to go for it. You can try other treatments like chemical peels or dermabrasion instead. These treatments can help lighten the skin and are not harmful in the long run. Also using moisturizer and sunscreen can help.

PCOD can trigger the hormonal imbalance which in turn causes hair loss. Some signs are irregular menstruation and acne. To promote new hair growth, you can try consuming a balanced diet full of fruits and vegetables, controlling stress, and keeping a normal weight. You may talk to your doctor about possible therapies for hair growth as well.