its good that you are aware of your problem yourself. The condition is known as" oral submucous fibrosis" in dental terms and it results due to tobacco chewing in any form (gutkha, khaini, pan masala etc.). If you want to get cured you have to immediately stop the habit of gutkha chewing. Take green tea and lots of tomatoes as they contain antioxidant. Eat lots of sugar
free chewing gums.