Q. Can light bleeding from anal opening occur during periods?

Answered by
Dr. Basuki Nath Bhagat
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Jun 10, 2022

Hi doctor,

I have periods. And I am going through preimenopause, where periods can be heavy. However, when I was wiping from the back, I noticed some very light blood; it was not bright red. Can this happen during the period? Please help.



Welcome to icliniq. com.

I have read your query and will guide you in your case. The menstrual period during perimenopause is experienced differently in each individual; however, the following changes occur in their periods during perimenopause:

1) Longer heavy periods.

2) Lighter and irregular periods.

There can be a change in the color of period blood, and it could be bright red to dark brown. The color and consistency of blood can change throughout the menstrual cycle, and the color could be bright red or brown, heavy or light. The period blood color is red in the first few days of the cycle, and near the end of the cycle, the discharged blood is older and can be discolored. You have mentioned that you noticed very light blood, which is not bright red, so this change can happen during the period, and I think there is nothing to worry about. You might be experiencing other perimenopausal symptoms too. I hope you find my reply helpful. Please follow up if you have any further related queries about it

Take care.

Hi doctor,

Thank you for the reply.

But my query was when I wiped my back passage; there appeared some very light blood. So, my question is, whether this normal? The blood coming out of the vagina is the normal dark red heavy blood.

Thank you.



Welcome back to

Sorry I did not get your question the first time. You say that some very light blood is present in the anal opening area while wiping the back passage. Am I correct now, mam?

If I understand your query correctly (I mentioned above), then such an appearance of very light blood in the back passage anal opening is not normal to occur during a period or else on the normal days. Please answer the following question for my better understanding,

1) Can you help me describe a little more about it so that I can think about what pathology it could be?

2) Do you find any blood in the stool?

3) Any chronic constipation issues?

4) Any history of internal or external hemorrhoids?

5) Any pain during defecation?

6) Do you notice any local skin pathology near the anal opening?



Thank you for the reply.

No blood in the stool. Yes, I have had constipation for about ten weeks now and had a colonoscopy done three weeks ago, which turned out to be normal. I have hemorrhoids, so there is a pain in defecation. And no local skin pathology.

Thank you.



Welcome back to

Thanks for replying to the above questions, mam. Now I can deduce the reason behind the appearance of very light blood in the back passage while wiping it. It is good to read that you had a colonoscopy procedure done, and it came out normal except for some hemorrhoids. The most probable reason is hemorrhoid which gets aggravated with constipation and straining while defecation, and this causes pain during defecation.

Are you taking any liquid or tablet for constipation? Do not worry; with changes in lifestyle and eating habits and, if necessary, chronic constipation can be managed with medication. I would suggest the following:

1) Maintain adequate hydration throughout the day.

2) Eat more fiber fruits and vegetables.

3) Prefer and practice going washroom at the same time daily as it helps the body strengthen the reflex.

4) I suggest taking syrup Lactulose or tablet Bisacodyl 10 mg at bedtime to help ease the bowel evacuation the next morning.

So I am summarizing the whole query.

You have asked that some light blood appears in the back passage while wiping, which is not normal. With the subsequent chat, I suspect hemorrhoid, which gets aggravated due to constipation. So you need to treat constipation to avoid such problems in the upcoming time.

I hope you find my reply helpful and meaningful. Please follow up if you have any further related queries about it.

Take care.

Hi doctor,

Thank you for the reply.

Would the colonoscopy not have picked up a hemorrhoid? Could it have developed in the last three weeks? I also had a CT scan with contrast of tummy, pelvic area, and chest, and nothing major here. I am on something for constipation. Is a CT scan with contrast good at picking up tumors? Thanks for your help.



Welcome back to

Yes, a colonoscopy can pick up if there is any internal hemorrhoid present. It did not appear in the colonoscopy report means it got developed in the last few weeks. The main problem is chronic constipation, and this has to be managed with medication and other interventions. I suggested the above in the last chat. There are many causes of chronic constipation, and the cause should be investigated further to treat the problem adequately. A few common causes include,

1) Hypothyroidism.

2) Hypercalcemia.

3) Irritable bowel syndrome is constipation-predominant.

4) Colonic obstruction due to neoplasm, stricture, ischemic, inflammatory.

5) Medications like Calcium blockers, Antidepressants.

6) Depression

Yes, CT (computed tomography) scan with contrast CECT (contrast-enhanced computed tomography) is good at localizing abdominal structures. It is very good to read that reports are completely normal. Do not worry; follow your treating doctor's advice, and I, too, guided some strategies to manage constipation and hope it would work to relieve you from constipation. Please follow up if you have any health-related in the upcoming time, and I will try my best possible to guide you

Take care.

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