Natrum phosphoricum (Nat-p)
The first tissue salt to think of for conditions arising from excess acidity, usually from eating too much sugar and dairy foods.
Natrum phos has traditionally been used for symptoms associated with heartburn and gastric acidity. Sour belchings after eating. Vomiting of sour, cheesy masses. Empty, gone feeling in stomach and abdomen, worse after eating. Heaviness and pressure in stomach. Sourness of sweat, discharges, vomit and stools. Startle easily from noise.