After a BBL, you should not sleep face down on your back for several weeks in order to avoid pressure on the newly transplanted fat. Surgeons usually advise to sleep on your side or use a donut pillow, which minimizes the pressure against buttocks during early recovery. Follow your surgeon’s specific post-operative instructions and individual recovery progress. It is important to follow your surgeon’s advice in order for you to get the desired result with minimal risks of complications.

The stubborn belly fat and the lost breast size can be very irritating. This is attributable to changes in hormone levels as you lose weight. Don't get burned out; you can still have tips. For the purpose of burning belly fat, eat healthily and exercise regularly. To keep the breast size the same, concentrate on strength training exercises that work on the chest muscles. 

The discomfort might come from your previous Gynecomastia surgery. One side of the chest could have pain because of inflammation or collection of fluids. It would be best if you saw a doctor about this who can advise on what treatment may be needed and any further tests that need doing. 

Moisturising face and using sun protection with a good physical sunscreen is important after chemical peeling at least for a week

Neither of these treatments is recommended for children under the age of 18. Chemical peels and laser treatments are not permanent skin whitening treatments. These treatments can help to reduce the appearance of dark spots, but they will not permanently lighten the skin.