panniculitis

noun

pan·​nic·​u·​li·​tis pə-ˌnik-yə-ˈlīt-əs 

1

: inflammation of the subcutaneous layer of fat

2

: a syndrome characterized by recurring fever and usually painful inflammatory and necrotic nodules in the subcutaneous tissues especially of the thighs, abdomen, or buttocks

called also relapsing febrile nodular nonsuppurative panniculitis, Weber-Christian disease