hi i had gone through your query and understand your concerns. i would come up with the possibility of LIPOMA
may be the cause for your sufferings
they move freely on the underlying structures,but may not be adherent to the overlying epidermis
-they cant produce harmful effects for you.
i advise you taking Homeopathic
medicines gives safe and permanent cure for your complaints
consult your local homeopathic physician for correct diagnosis of the case and remedy to fit your complaints
I hope this is helpful for you, thank you