It is preferable to have a specialist buttock surgeon inject buttock filler, rather than a general doctor who is not a cosmetic surgeon.
The volume of filler required.
Some patients underestimate the amount of filler required and the cost of this expensive procedure.
The type of filler being injected.
The brand of hyaluronic acid being injected is very important to the quality of the result. Harley Buttock Clinic uses HYAcorp filler.
Less expensive fillers will reabsorb quickly and may leave lumps.
Whether to have the procedure while awake using a local anaesthetic, or whether to be put to sleep.
Having the procedure when sedated avoids the pain of filler being injected, and also allows the surgeon to reach deeper areas of the buttocks, improving the result.