Unfortunately, bruising is a common side effect of any filler injections, especially Sculptra due to the depth of the treatment. Like with other fillers, injection-related adverse events are frequent, including inflammation, bruising, swelling, pain, and itching, but they resolve spontaneously in a few days. Large bruises such as yours can take some time to resolve. Arnica, both topical and oral, has never been shown to be better than a placebo. Vitamin K oxide gel has been shown to be only slightly better than placebo (possibly) but why waste your money on something that is only minimally effective at most. Bromelain tablets are inexpensive and might shorten the recovery time so they are worth considering. Otherwise, please have a good aesthetician show you how to conceal the bruise with the proper cover up until it has resolved.