Your child is having acute gastroenteritis most likely viral.start syp zinconia 5ml od*14 days,ors &include curd,banana,khicri,buttermilk,coconut water.
In case of any danger sign like lethargy,blood in stool,decrease urine output ,thirsty child visit nearby pediatrician.
As per your previous history of chronic constipation your child require proper medication which usually last for 6 months with some changes in diet.glycerine suppository is not a treatment modality for constipation.Kindly visit pediatrician for chronic constipation or else it will be a major issue for your child in coming future.
Next Steps
Online consultation with pediatrician
Health Tips
Look for danger signs