Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand.. As per your complain it seems that there is roughness of the mucosa due to dry mouth as the symptoms of teeth sticking to the inner side of cheeks is seen in case of dry mouth only.. Roughness of mucosa is appearing due to wrinkling and atrophy of mucosa secondary to dry mouth.. You should consult an Oral Physician and get evaluated and a thorough clinical evaluation can help in diagnosis and in case of dry mouth the exact cause of dry mouth will be ruled out out of which common causes are salivary gland disorders,nerve damage, fungal infection like Thrush, mouth breathing, side effects of medicines etc.. As of now you should suck tart candies and chew sugar free chewing gums to stimulate saliva flow.. You can also use specialized mouthwash that is formulated to relieve dry mouth and contain active ingredient as Methylcellulose.. Avoid regular mouthwash as they have a drying effect.. Drink plenty of water and maintain a good oral hygiene.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.