Stomach pain Reasons and tips. Stomach.

Hello sir Baby girl age 2 and half year weight 12kgs Just now mbbs doctor written attached drops whether In can continue always or not pls tell Pls  tell dose how much and what stage I can give She was complaining every month like 2 or 3 times all of sudden stomach pain since 3 months she saying . So pls advice any syrup or reasons also She will not eat any outside food. May I know some of my parents saying children's will get some of bacteria in stomach while they growing so pls tell is der any thing like that or not pls tell . And pls advice any scanning I have to do or not . Once she will tell and she will forget about pain becoz in a week 2 times she will say about pain in stomach .