Thanks for your question on Healthcare Magic. I can understand your concern. Possibility of infected sebaceous cyst is more. Sebaceous cyst is common in areas where hair are more. So scalp is the common site for sebaceous cyst. When lumen of sebaceous gland is blocked, sebum tend to accumulate and cause swelling. It causes infection and pain. Gradually it will regress by itself only to appear again in future. This is the reason for your recurrent sebaceous cyst at the same place. Best treatment for such cyst is surgical removal. Once you remove it surgically, it won t grow again. So at p, consult surgeon and get done excision of this cyst. Don t worry, you will be alright with this. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.