Do not worry.
The pimple like lesion contining black cheesy material is just small sebaceous cyst, also called epithelioid cyst
It is a harmless and benign.
Only secondary infection can occur.
And therefore , one has to get rid off.
There is simple and easy treatment.
Excision under local anaesthesia ... And that should be done by surgeon.
You consult either dermatologist
He will excise the lesion under LA.
I hope you got my answer.
Dr. Ilyas Patel MD