Hi,Dear,Thanks for your query to HCM.
Studied your query in full depth of its details.Reviewed it in context of your health concerns.
Based on the facts of your query,You with stressed shoulder, seems to suffer from-friction induced bruised lump inline of the bra strap.
Take care with your doctor,before it complicates in to infected swelling leading to
abscess.
Possibility of blood clot is very less,as its in tender stage after the friction,suggesting acute inflammation with ? local infection at the frictioned area.
Hope this reply would satisfy you and would help you to plan further treatmentwith your doctor there.
Welcome any further query in this regard,which would be replied in next session.
Will appreciate YOU,to write your excellent review feedback comments of this service experience, to help the needy patient visitors like YOU, at HCM services.
Good Day!!
Dr.Savaskar M.N.
Senior Surgical Specialist
M.S.Genl-CVTS