It depends on the type of filler you had injected. Hyaluronic acid based fillers will show results immediately, but you need to give it at least 2 weeks until the swelling goes down to get a true assessment of the end result. Other fillers, such as Sculptra will take a few months to see the full result. Therefore, unless the type of filler is known, the question cannot be answered properly.
It depends on the type of fillers and the location. Most facial fillers the results are immediate but it takes a few weeks before swelling has subsides to see the final results.Good luck!