Treatment to eradicate H. pylori infection is far from perfect. Allow me to elaborate. H. pylori is a bug that can infect the stomach and cause ulcer disease. This bug is present more often in older people. It is not clear how it is transmitted but experts think it may be related to poor sanitation.
Infection usually occurs in childhood.
Drug regimens are available for treatment. Another major cause of ulcer disease is nonsteroidal anit-inflammatory agents like aspirin, motrin, bufferin, excedrin, advil, naproxen, anacin etcetra. Tylenol does not cause ulcers. Since I cannot see the pictures I am unable to offer you a diagnosis. From what you have described it seems that you have ulcers and erosions.