Muscle pain and sore legs n buttocks after fat transfer, is this normal?

Thank you for your question, it is very unlikely that your muscle soreness is related to the procedure done 8 months ago, perhaps its due to hard workouts or strenuous activity.

It is unlikely that muscle soreness and pain is related to a surgical procedure of the buttocks about 8 months ago, but it is possible.  If concerned see your surgeon and if he feel it is not related, perhaps he can refer you to the right doctor.

Soreness and pain in the legs are very nonspecific symptoms. I would be surprised if those symptoms are related to surgery done over 6 months ago.However to make sure please see your primary doctor or your plastic surgeon.