What would be the cause for burning sensation in stomach. it used to be often but stopped when i stopped coffee. but for few days its burning. what can cause it, i am 46?

GERD/Heartburn: Heartburn can be caused by acidic stomach contents backing up into your esophagus. If this happens 2 or more times per week it is called GERD (Gastroesophageal Reflux Disease). Lifestyle changes can ease the symptoms: drink more water, eat smaller meals, avoid trigger foods including fats/hot sauce/coffee) lose weight, stop smoking, sleep with head elevated. A Dr can prescribe meds.