Acidity/ acid reflux, is a condition characterized by heartburn around the lower chest area. Chronic acidity is termed as GERD. Symptoms include Burning sensation in throat/chest usually after eating, which might be worse at night, Bitter taste in your mouth, Bloating, Burping, Hiccups, Nausea, Dry mouth, dry coughing, Burps with undigested food/ sour liquid, Sensation of a lump in your throat.