Yes moderate osfm can definitely be treated. The first step has to be cessation of any bad habit (such as tobacco chewing). Your doctor will probably start with medications such as SM fibro for a month. If these don't make much of a difference, then the next option would be to give intra oral injections at the affected site. If these also don't work then the last option would be a surgery followed by mouth exercises.

There are various grades of Oral Sub mucous Fibrosis ( OSMF ) first two stages can be treated conservatively using cessation of habit and intralesional injection If mouth opening has reduced drastically better for surgical options which include fibrotomy to be done under General Anesthesia