I’ve fallen on stairs, had a bruise, how to recover that dent on my booty? (Photo)

Dear hhanaginn,
it is hard to tell for sure without an examination. Based on your photo, it looks like you probably would benefit from fat transfer to fill the dent. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery