A member asked:

I have a knob in my shoulder is this lactic acid?

A doctor has provided 1 answer
Dr. James Bicos answered

Specializes in Orthopedic Surgery

No: Lactic acid, although we say "a build up of lactic acid" , etc, does not make a bump or knob. You could have a muscle spasm of some sorts or another injury such as a muscle tear.

Answered 4/14/2021

4.7k views

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