Hi Dear , As per your query you have feeling of tightness om the right side of the face which come and goes . Well there can be many reasons for symptoms you mention in query , but in you case it seems to me that the reasons for symptoms id bell s palsy . Bell s palsy causes sudden weakness in your facial muscles. This makes half of your face appear to droop and make musle of the other side of the face feel tight . Damage to the facial nerve that controls muscles on one side of the face causes bell s palsy . Other reasons are like Cold sores , herpes simplex , Chickenpox and shingles and Mononucleosis . I would suggest you to do facial muscle exercise and start physical therapy of facial muscles . Usually it goes away by its own in few days , but if condition doesn t get improve then consult neurologist for proper diagnosis and rule out condition like trigeminal neuralgia . Doctor may prescribe muscle relaxant , anti viral or anti inflammatory along with vitamin supplements , Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari