Need surgery..

Pic is showing ganglion rather than lipoma but as u r saying its multiple so i need to ask u some relavent questions to give u proper diagnosis.

You should consult a surgeon and should be examined

Lipomas are firm/soft and freely mobile in all directions. They are cosmetically disfiguring otherwise they dont cause pain or functional disturbances. Multiple such lipomas arising in a short span of time could be a syndromic association.(not to worry) since u say it feels hard, i would suggest you to consult a surgeon as there are more differentials which cause multiple swelling not just a lipoma.