Hi thanks for asking question. Green tea or chamomile in tea is good herbal remedy for constipation cases according to various literature.It has no harmful effects. You can have constipation because of lack of water intake, sedentary life style , lack of exercise, low fiber food etc. So drink more water. Food with high five taken more like apple, banana, whole grain, wheat bran etc... Regular exercise done. Fruits more. Digestive enzymes or fiber supplementation can be taken.. If still no benefit do USG abdomen. Over the counter laxative can taken if still no benefit. I hope my answer will helpful to you... Take care.... Dr.Parth Goswami