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The symptoms you have described of having severe pain in left side around the bottom of rib cage since last night can be due to various causes such as:gastric ulcer,pancreatitis,spontaneous splenic rupture,diseases of the colon,distension of the splenic flexure of the colon and some other rare causes.
You need following tests:
- Ultrasound scan
- Upper endoscopy
- Blood tests
Take tab. Ibuprofen 400mg from the counter. It is available as OTC(over the counter) without prescription & will help you greatly.
So my best advise for you is to please make an appointment with your doctor to have these tests & examination done so as to know the exact underlying cause & then treatment will be done accordingly.
Hope this helped
If you have any further question then you can ask me.
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