What is the cause of dull abdominal pain after constipation is over?

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Hello doctor!
I have sharp pain, dull pain in the abdomen around the navel, about 2-4cm from the navel, with no specific location, sometimes on the left and sometimes on the right. 2 months ago, I had flatulence, indigestion and constipation, but at that time I could still defecate, so I was subjective. After 2 weeks, I had severe constipation, had to buy stool softeners and pump to make it easier to pass.
If you eat properly, the constipation will reduce slightly but still last for a whole month. After the constipation is over, the abdomen is very painful, dull, every time it is hungry, it is very painful (before there was no such symptom). I went to the doctor but the doctor said that if I don't have blood in the stool, I will eat and drink normally, but this situation will be better but it has been 1 month and I still have stomach pain. Doctor let me ask why is the dull abdominal pain after the constipation is over? What's wrong with me? I would like to thank you.
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Answer
Hello!
Symptoms of dull abdominal pain after constipation, pain around the navel, unknown location, pain when hungry, ... as you describe may be in the context of Irritable Bowel Syndrome. However, to make a definitive diagnosis, you need to perform a colonoscopy. Then you need to be carefully instructed about diet and medication. You should see a gastroenterologist for more detailed instructions.
Thank you for trusting Vinmec Health System, looking forward to meeting you directly for more detailed advice. Best regards!
Consulted by Master, Doctor Pham Thi Thu Huong - Head of Department of Gastroenterology - Endoscopy - Department of General Internal Medicine - Vinmec Times City International Hospital.