Hi, Thank you for posting your query in healthcaremagic.com This is Dr. Swarnava dattagupta answering your query. I understand your concern. See, you are quite right about it and mostly it happens due to some muscle or sphincteric spasm. There might be some other causes but they are very rare and are considered only after muscle spasms are ruled out. I would suggest you to take decolic or spasmoproxyvon tablets but it might not be essential because the spasm gets better after some time, when pressure is released. Hope i have answered your question. If you have any further questions i will be happy to help. Regards