At a glance
Many women with a fissure notice a pattern. The bottom feels fine for a few weeks, then flares in the days before a period or in the first days of bleeding. Some describe a small re-tear that settles once the period ends. Others feel a general rawness, more spasm, or a sentinel tag that swells at the same point each month.
You are not imagining it. It is one of the most common things women raise in fissure communities, and there are plausible reasons for it.
This guide covers what people describe, why it may happen, what they try with pads, tampons and sitz baths, and how a cycle fits around Botox or surgery.
What people describe
The accounts are strikingly similar:
- Firmer, smaller stools in the days before a period. Many women notice harder bowel movements even when nothing else has changed.
- Looser stools or diarrhoea on the first day or two. This can bring burning and frequent wiping.
- More cramping and tightness. Some describe the bottom feeling “tighter” or more prone to spasm alongside period cramps.
- A swollen sentinel tag or general puffiness that tracks the cycle.
- A small spot of blood at the same point each month, which they only spotted once they started writing it down.
- Feeling more anxious or tense around a period, which some think feeds into spasm.
A common turning point is noticing the timing. Once people mark flares against their cycle, the pattern often becomes obvious. That record is also useful to bring to an appointment.
Why it may happen
Clinicians and women themselves usually point to a mix of things rather than one cause.
Hormones change the bowel. In the second half of the cycle, rising progesterone tends to slow the gut, which can mean firmer stools. When a period starts, prostaglandins (the same chemicals behind cramps) can speed the bowel up and loosen stools. Either extreme can irritate a fissure.
Pelvic congestion and fluid retention. More blood flow and swelling in the pelvis can make the area feel heavier and more sensitive.
Cramping and muscle tone. Some women are told that period-related hormones affect smooth muscle. Many simply notice that period pain and bottom pain arrive together.
Moisture and friction. Pads keep the area warm and damp. That can soften and irritate skin that is trying to heal.
Medication. A few women using nifedipine cream wondered whether their periods became heavier. Heavier periods are not a commonly reported side effect of the cream, but if your cycle changes after starting any treatment, mention it to the prescriber rather than stopping on your own.
Occasionally, rectal pain or bleeding that reliably comes with every period has another cause, such as endometriosis affecting the bowel. This is uncommon, but it is worth asking about if the pattern is very regular, or comes with deep pelvic pain or pain during sex.
Practical points people raise
These are things women commonly describe trying. They are not a treatment plan. Your GP or clinician can tell you what suits your situation.
Planning around the cycle. Some people pay extra attention to stool softness in the week before a period, because that is when stools tend to firm up. Others ask their GP about adjusting their usual stool routine at that point in the month.
Pads or tampons. There is no right answer. Some find a tampon adds pressure during a bowel movement and take it out first. Some switch to pads on bad days. Others find pads trap moisture and prefer changing them more often. Period pants and menstrual cups come up too, with mixed views.
Keeping the area clean and dry. Rinsing with water rather than wiping, patting dry, and changing pads often are the most repeated tips.
Sitz baths. Women commonly carry on with sitz baths during a period. Several mention the warm water also eases cramps, and that flow often slows while sitting in water.
Cool comfort for a swollen tag. Some use a cool pack wrapped in a cloth, never directly on the skin.
Pain relief for cramps. People use their usual period pain relief. Some combination painkillers contain codeine, which can cause constipation, so ask a pharmacist which options will not firm up stools, and whether they mix with any fissure treatments you are using.
Hormonal contraception. Some women have discussed with their GP whether hormonal contraception that steadies or pauses periods might reduce flares. Others find their cycle became more irregular after a change. This is a conversation for your GP, not something to try on your own.
Botox, surgery and your cycle
Periods worry many women before a procedure. The common experience:
- A period usually does not stop Botox or surgery going ahead. Tell the team beforehand so they are not surprised.
- Hospitals often ask for a pad, not a tampon, on the day. Some women were told this relates to tampon safety during anaesthesia.
- A late or missed period before a procedure needs to be mentioned, even if stress is the likely reason. If there is any chance you could be pregnant, tell the team as soon as possible; expect to be asked for a pregnancy test.
- The first period after surgery is something many women dread. Experiences range from no change at all to a few days of extra soreness or a spot of blood. Many avoid tampons until post-surgical swelling has gone down.
If your period is due soon after a planned procedure, ask your surgeon how to manage it with the wound and any creams you are using.
When to seek care
Get urgent help (go to A&E or an emergency department, or call 999 in the UK or 911 in the US) if you have:
- Heavy bleeding from the bottom that does not stop or keeps soaking through
- Severe pain that is getting worse rather than better
- Fever, swelling, throbbing or discharge that could mean infection
- Feeling faint, dizzy or breathless
See your GP or clinician if:
- Bleeding or pain from the bottom returns with every period
- You have deep pelvic pain, pain during sex, or bowel symptoms that follow your cycle
- Your periods have become much heavier, or you feel very tired, as heavy periods plus rectal bleeding can lead to low iron
- Your fissure has not improved after six to eight weeks, or keeps re-tearing
- You have had surgery and notice heavy bleeding, fever or worsening pain around your first period