May be similar to sepsis, treat with IV Vitamin C + Thiamine + Hydrocortisone 
If you ended up having to go on antibiotics, which is often the case, you will want to start replenishing your beneficial bacteria. Choose a good probiotic such as MegaSpore Biotic, and also take some beneficial yeast to help with yeast/bacteria imbalances.
Hilary Salmon Cellulitis? Work to heal the mitochondria. Collagen. Nad+ nicotinamide riboside. Pqq. Oxaloacete. Forskolin. Get off statins and similar meds... I see these sorts of cellulitis occurring after age related meds are prescribed. 'I would have healed from this scratch by now ' is a common comment I hear. Hospitals use hyperbaric oxygen in persistent infections. Try high fat moderate protein ketosis
Remove all possible other toxins from diet and environment... all of them. No cheats