Thanks for the query.Cystic acne
is formed when the infection gets walled off by cyst wall.
Oral or topical medications may not be helpful in this.
You may require treatment with intra lesional steroid
Please meet a dermatologist
for exact diagnosis.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.