Emm, I think you need to go to the ER. Believe me, you can't handle this yourself. You need intravenous antibiotics to treat the cellulitis.
Cellulitis should be treated with antibiotics under the doctor's supervision. As for which kind of antibiotics, it depends on the specific bacteria you are infected with. For patients with neuropathy, they may not feel so uncomfortable since their feelings are abnormal due to the neuropathy. But they still should go to the hospital for effective treatments.