Hi,Dear Thanks for the query to HCM virtual Clinic.
I studied your query with available details given in your query.
I understood your health concerns.
Cause of the lump on the shoulder blade-
My clinical opinion on your query is-
-On the existing information I would give my opinion herewith.
Your shoulder lump could be either
-a Sebaceoust
Cyst with Sessile lump,but in which infection got activated and has become painful at rest and without touch even lately.
-OR it could be Mole -
nevus which has lately changed to
malignant melanoma,with its local invasion and is hence painful.
So Don't worry till you get the USG guided FNAC
Biopsy of the .shoulder mole which has become painful lately.So consult a ER Surgeon.
If not, Surgical Excision Biopsy with HPR would treat it totally.
Don't Self-treat or medicate in your case as the case may go in to further complications.
Hope this reply would resolve your query and would help you to plan treatment with your doctor.
Hope this would relieve of your health concerns.
Welcome for any further query in this regard before final suggestions are given in your query.
Wishing you fast recovery..
Have a good day.
Dr.Savaskar M.N.
Senior Surgical Specialist.