What causes Pain in lower stomatch?

Dear ,dont worry If this is first time ,if not severe then no need to worry There are thousands of reason behind it so can't comment If u still feeling pain consult doctor ,without examination not possible to comment

consult doctor any general physician

warm water for drink ,need of observation 

If this was a single isolated incident then you don't require any intervention, but if this problem is persistent kindly visit the ER so that you can be evaluated and undergo investigations to find the underlying cause of it. These following lifestyle changes may be of help: - Don't skip meals and preferably consume food at the same time everyday. - Reduce/ Avoid spicy,fried, fatty, junk and oily food - Avoid/ Limit drinking coffee, tea and carbonated drinks to once a day - Exercise regularly - Increase daily intake of water to 3 liters - Avoid/Stop smoking and drinking - Reduce stress through methods such as yoga/meditation. - Avoid painkillers as it will increase your gastric problems at this moment. If the condition persists or worsens visit the ER at the earliest