Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. As per your query, the symptoms of reduced mouth opening due to Gutka chewing can be due to most common reason that is Oral Submucous Fibrosis in which there is formation of thick fibrous bands below the mucosa of cheeks and lips leading to stiffening and difficulty in mouth opening. It is a precancerous condition [although not cancer] and should be taken care of. It is commonly seen in individuals with tobacco and areca nut chewing habit. You need to consult an Oral Physician or a Dentist and get evaluated and he can advise him to apply a steroid ointment in combination with hyluronidase containing ointment to break fibres. SM Fibro should be continued. Intra lesional injections of steroid and hyluronidase can be advised to be injected after every 3 to 4 days. Physiotherapy like blowing cheeks, trying to open the mouth under pressure etcetera can be demonstrated and advised to be done daily. Complete cessation of habit of tobacco if you have this habit. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Honey Arora