Hello, I am Dr. Charles Mano Sylus, Consultant General and Laparoscopic Surgeon in Fortis Hospital Vadapalani, Chennai. I will be able to help you. As per your history, it looks more like multiple lipomas, but you said, it started like a pimple and now is like a coin, I feel those pimple swellings could be sebaceous cysts of the sweat glands.
Next Steps
I would suggest you can visit any General Surgeon and get it removed by surgery either under local anasthesia or general anasthesia.
Health Tips
1) it is a day care procedure
2) but these 2 conditions have a possibility of recurrence very rarely on the same spot but many times on other places.
hope I was helpful.