Thank you for the query.
You should ask your doctor what exactly he wants to operate? As constipations are usually caused by bad diet and low physical activity, it is hard to treat it with surgery.
Before any surgery it is good to know the reason. Such symptoms can be caused by IBS
, bowel obstruction due to inflammatory intestines disease (Crohn`s disease), large intestine polyps or even cancer. To get to know the reason, some tests are necessary. It is advisable for you to have abdominal ultrasound
, full blood work, stool tests and colonoscopy
Bleeding from anus, pain and narrowing is caused probably by anal fissure
due to constipations.
To improve stool consistency you should drink more water, avoid fatty foods, increase fiber rich products and physical activity.
Hope this will help.