How can I fix a pointy butt?

Allow me to answer your question as best i can based upon your photos. However, please keep in mind that an in-person consultation with physical exam is first necessary before any legitimate evaluation or final surgical recommendations can be made.   That being said, because you’re so lean you are definitely not a candidate for fat transfer. I also would strongly dissuade  you from the temptation of a quick fix such as any type of fillers or devices such as Emsculpt which either have dangerous or deadly consequences or only temporary improvements and very costly long-term expenses for little result. Essentially buttock implants would be your only reliable permanent option. In the meantime I encourage you to continue working out and seeing if you can build the muscle and volume naturally. Glad to be of help. 

Thank you for your question. Best procedure to alter your buttocks is a Brazilian Butt Lift. It consists in doing liposuction on your abdomen, waist and back and grafting fat to your buttocks. Fat transfer will change the shape and size of your buttocks. However, I do agree with the rest of my colleagues, you look beautiful as you are. 

Hello dear!
Thanks for the question and provided information as well.
Based on your pictures, you are a good candidate for liposuction with BBL, and I think you'll get very good results.
Liposuction allows your plastic surgeon to transform your entire shape. You can improve your abdomen, back, hips and flanks, and of course your buttock, to give you a beautiful heart shape.
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

Hi. 
You appear to have normal anatomy and to have a nice  shape on your derriere. Your ischial bones ( part of your pelvis)  are the bones that you are noticing when you bend over. You could augment the buttocks with fat injection in the the surrounding areas to deemphasize this aspect, but if you only notice it in one particular  position, you need to ask yourself if the expense and risk of having surgery is worth the change. ( Or if you want larger buttocks) The bones themselves will not change of course with a gluteal augmentation. Be cautious relative to surgery as this procedure is not without significant risk if performed without expert knowledge of the regional anatomy. 

Certain poses can accentuate certain anatomical landmarks on some people.  Overall, your photos show completely normal, even ideal, proportions.  I would dissuade you from doing anything, as the risk/benefit isn't worth it.

Thank you for your questions and your photos. Your best option would be to schedule a consultation with a Plastic Surgeon who can provide you with observations and suggestions based on a face-to-face examination. Good Luck.