Leaking sebaceous cyst for 4 months. Pain is increasing after clyndamacin along w/ sharp pains near site. Surgery not for another month. What do I do?

Have cyst checked. These cysts are often painless but if you are having tenderness this may be infected. I would suggest applying warm compresses to the site of the cyst and get evaluated by the surgeon or your primary doctor if there is no improvement over next day.