Hi, thanks for writing to HCM.
As per the description, the swelling is not arising from deeper structures and is not arising from the bone as it is freely mobile. Any swelling not resulting due to trauma or injury
needs observation. An evaluation is necessary in the following instances -
* if the size of the swelling increases rapidly
* if it becomes painful or tender to touch
* if there is any change in the colour of skin overlying the lump
* if it becomes suddenly soft in consistency
Hope this helps