Swollen groin lymph nodes that are tender to touch & feel enlarged. given 10 days of keflex, no change. mri of pelvis did not reveal any swollen nodes?

MRSA cellulitis?: Are they really lymph nodes and not localized skin infections? The fact that they are painful suggests infection. The lack of response to Keflex suggests methicillin-resistant staphylococcus aureus (mrsa). I would recommend seeing your doctor and getting a medication that works for MRSA in your community (could be Clindamycin or bactrim; your local doctor will know best).