I have a swollen lump under my skin above my rib cage. could this be due to sarcoidosis? other conditions?

Lump: Lumps are nonspecific, could be almost any kind of tissue.

Depends: Sarcoidosis is an inflammation in the body of unknown cause where nodules (granulomas) form in many locations, including under the skin. 25% can get skin rashes. Lumps under skin can also be due to benign conditions such as lipomas (fat lumps), small tumors. Tell your md if this is a persistent problem to be sure it is not anything more concerning.