Can diarrhea cause anal fissures?

No. Anal fissures are almost always caused by constipation or anal distension (such as with anal intercourse or anal manipulation). Fissures can also be associated with hypertonic anal sphincter. The treatment centers around trying not to stretch the anus too much: stool softners, less aggressive sexual practices and sometimes relaxation of the anal sphincter by surgery or Botox injection.
No. Anal fissures can occur secondary to constipation. If someone has long standing constipation and they use laxatives , they can sometimes develop diarrhea due to laxatives . There can be other reasons for diarrhea like inflammatory bowel disease or bowel cancer which would need to be ruled out first in such cases .

Related Questions

My husband has had sever diarrhea, stomach cramping, back pain, and anal fissures for years, told it's not crohn's, what is it?

Can be several thing. Has he consulted with a gastroenterologist? If you are considering somebody in the area, i'm happy to give you some recommendations. Everything you are describing can be secondary to the severe diarrhea. There are several things that can lead to this. He should be seen by a good GI doc for full eval and treatment. Read more...

Do anal fissures require surgical removal? Had bloody stool for less than 20 times in the past 3 years. With pain sometimes. Had occasional constipation and diarrhea. No anal sex history. Thanks.

Anal fissure... ....As opposed to a "fistula" (which might require surgery) is simply a small tear in the skin of the anus, and is associated, as you've described, with trauma from problems like constipation. They are superficial and heal rapidly. Increase the fiber and water in your diet to keep the stool soft, and they will be less likely to occur. Read more...
Surgery not required. Anal fissures can usually be treated conservatively. In fact, a lengthy attempt at conservative therapy is usually best in my opinion. It can take 'a while' for anal fissure to heal. If or when conservative therapy fails, then there are surgical options that are very successful. Have you been evaluated properly? How do you know you have a fissure? If not previously evaluated, please get checked. Read more...

I have had diarrhea for 8 months which has caused me to feel like I have an anal fissure. How would I know for sure if I have an anal fissure?

Anal Fissure. The only way you can know if you have an anal fissure is to be examined by a doctor. Pain, bleeding, and rectal irritation can all be signs of various rectal problems. An anal fissure can lead to a peri-rectal abcess, so it is important to find out if that is your problem and if so, have it treated. Read more...
Also. In addition to dr kelber's answer, you should be evaluated as to why you have had prolonged diarrhea. This needs proper evaluation probably even more so than the fissure. Until the diarrhea is diagnosed and corrected you will have ongoing problems with your bottom. Read more...