Hi there... Just read back sorry I didn't respond sooner. The light surgery is actually one my dr. out of PMH invented. Very cool it's being used elsewhere. That said, your hubby's swelling will subside. And at this point forcing himself to open his mouth is not a good thing. Once he's healed and stitches dissolved he can begin t gently stretch it... Skin eventually stretches over time, (kinda like gaining weight...) so he should allow healing and follow through on his treatment then slowly once his wound site is healed he can start to do exercises (physio) to help stretch the area. It will take time. I do the same with my neck. And it has really loosened up. Hugs and best wishes.