I am copying what Dr. Joe wrote about a similar problem on another farmer's earlier question:
Ok.. Here we go . This can be one of a few things. Lumpy jaw( actinomyces bovis), woody tongue( actinobacillus ligniersei), or fusobacterium (fusobacterium necrophorum). Yes, you can have woody tongue even when on the jaw but not into the bone. If attached to the bone, likely lumpy jaw, if soft tissue only- likely woody tongue. These are nicknames for 2 bacteria that are very similar. Good thing is, they are both susceptible to oxytetracyclines the best. Noromycin or tetradure at 5cc per 100 lbs in muscle and lasts approx 7 days. If bone is involved, you need to add NaI(sodium iodide) at 6 cc per 100 lbs iv and repeat in 14 days to penetrate into the bone. Fusobacterium is an anaerobic bug that is commonly found in the gi tract of livestock and is commonly found in contaminated soil( years of build up of fecal matter). These abscesses can form from trauma to cheek or face when eating prickly pear and simply biting their on cheeks, or from hard alfalfa stalks poking their cheeks as they eat. Both lumpy jaw and woody tongue bacteria are commonly found in the mouth. The trauma breaches the protective mucosa of the mouth allowing these bacteria to enter the tissue and the body walls off the organisms keeping them from "entering the body." thus abscessing(pus). They are not the same as CL(caseous lymphadenitis) in goats- CL is a different bacteria- archanobacterium pyogenes. In goats, CL when lanced can get into the soil, contaminating it, and you can be guaranteed to see other goats to develop it. Fusoguard works great to prevent the deer abscesses each year, especially in does prior to fawning to protect the fawns. Foods for thought- all these bacteria are treated the same- tetradure, noromycin, or sodium iodide if needed. Hope this helps, God bless and good luck!!