Stomach ulcers can be cured in days. They are caused by bacteria that thrive in very acidic environments. The use of medications or by diet. Antacids only help temporarily. An alkaline diet is the best way to heal a stomach ulcer. Potato juice mixed with extra virgin olive oil and can neutralize stomach acid. Mauve and plantation tea is another option to heal ulcers. White clay can be used as a natural antacid. These home remedies can help deal with stomach ulcers.