I am 46 and the same issue for 3 years and this year decided I would say something to my doctor. I was at the point where I would dread going because I would have to wipe so much then go back in a hour because I would feel I had to wipe again. My doctor said I need to start taking Metamulic or any other fiber supplement. Pill form doesn’t work so got the powder and make one drink at night before I go to bed and it works. I don’t need hardly any toilet paper anymore. I ask the doc why the change and he said it is normal for most people in 40’s to start having to use the supplement. Family member had the same issue and told them and it work for them also.
It doesn't sound like diverticulitis. I would recommend eliminating all lactose (milk, cheese, butter, ice cream, yogurt, etc.) not just milk or else you might not see an improvement even if this is the problem.
I 've switched to almond milk for the time being. I don't think this is Diverticulitis which is: is swelling (inflammation) of an abnormal pouch (diverticulum) in the intestinal wall. These pouches are usually found in the large intestine (colon). The presence of the pouches themselves is called diverticulosis.
look up diviticulitis its a symptom when your anus muscle wall fail to cut of when you finish evacuating,hope this helps
Welcome to the gastroenterology community! I would bet that this problem could be improved with dietary changes. I would first recommend eliminating 100% of all lactose for at least 2 weeks to see if that helps. I would also recommend changing to using something like Tucks (you can find this at the drug store) which will be easier on your rectum.