Hi Dear, Welcome to HCM. Understanding your concern. As per your query small hard lump at the back of your throat , red lines and tonsil stone are pointing towards a condition known as granular pharyngitis along with tonsilloliths . Need not to worry. I would suggest you to start with warm saline gargles and betadine gargles 3-4 times a day. For pain and swelling you should take ibuprofen or acetaminophen. Consult ENT specialist for proper diagnosis and rule out condition like strep throat and viral infection . Doctor may prescribe antibiotics (penicillin or amoxicillin ) or anti viral drug depending upon the diagnosis along with decongestants and anti inflammatory . Avoid hot, sharp , spicy food substances , do warm saline rinses and carbonated beverages. Hope your concern has been resolved. Best Wishes, Dr. Harry Maheshwari