Many commercial products on the market can be used to remove small areas of surface mold. However, it is imperative to determine the underlying cause of the growth. If there is a hidden problem above the ceiling, such as a leaking pipe or sweating of the air conditioning ducts, the mold growth will return. Both issues will result in structural damage to the ceiling if not investigated and the cause corrected.A professional should be contacted to determine the cause of the mold growth and provide recommendations for correcting the problem.