Brief Answer:
Detailed answer below.

Detailed Answer:
HI XXXXXXX
Stomach ache with loose motions ...very short information..you should give some more information weather its long standing or few days./ your age, more information about your digestion/were you exposed to polluted wter or food etc.

* But the symptoms suggest bowel infection or indigestion (over eating ,eating foods that cause allergy...like wheat, mangos etc or food poisoning.).
* Stomach ache can be controlled with anti spasmodic drug like Cyclopam (take only half pill two times a day..for one day)
* I would suggest drinking lot of clean water with ORS powder to maintain hydration/.Eat small amount of food easy to digest (tenderly cooked rice, sago pudding with little milk, butter milk, lemon water with salt&sugar,tea or coffee with less milk)...)/ take rest.
* Most of the times the complaints would go ,as bowels get rest&relief.
* *In case there is no relief or if you gets symptoms of dehydration (dizziness,weakness, head ache,/tiredness/ dry lips,mouth /having less urination only few rimes)- you should consult your Family physician...for you may need iv fluids &specific drugs to control the infection.
I hope that is helpful.
Any follow up query is welcome.
Thanks.

---