Yes — a fibroid can cause real, sometimes sharp pain partway through pregnancy, most often in the second trimester. The usual cause is the fibroid growing faster than its own blood supply can keep up with, a process called red degeneration. It's uncomfortable and needs monitoring, but it's a recognised and generally manageable pregnancy event rather than an emergency in itself.

Why fibroids act up specifically in the second trimester

Pregnancy hormones can make existing fibroids grow, and a fibroid growing faster than the blood vessels feeding it can supply oxygen leads to small areas of tissue starved of blood — degeneration. This tends to show up as localised pain and tenderness directly over the fibroid, sometimes with mild fever or a slight rise in white blood cell count, and it's most commonly reported in the second trimester, when this growth spurt is most active.

What the pain typically feels like

  • Localised, aching-to-sharp pain directly over a fibroid's known location, rather than diffuse cramping
  • Tenderness when the area is pressed
  • Sometimes low-grade fever
  • Occasionally, a mild drop in haemoglobin if there's associated blood loss into the degenerating tissue — which is why your doctor may check a blood count alongside examining you

How it's usually managed

Degeneration pain is typically managed conservatively — rest, safe pain relief as advised by your doctor, and hydration — since the process is usually self-limiting and resolves as the tissue settles over one to two weeks. Your doctor will typically also check that the pain isn't coming from something else that needs different treatment (see the checks below), and will monitor your haemoglobin if there's any suggestion of blood loss.

What else it needs to be checked against

Fibroid degeneration is the most common explanation for fibroid-related pain in pregnancy, but the same monitor-versus-treat thinking that applies outside pregnancy still shapes the plan afterward. In the moment, your doctor still needs to rule out other causes of abdominal pain at the same stage — round ligament pain, a urinary tract infection, or, depending on exactly where the fibroid sits, pressure effects on nearby organs. This is part of why a fibroid causing new pain in pregnancy is always worth reporting rather than self-managing at home.

Fibroid degeneration pain is uncomfortable and disruptive, but on its own it's a recognised, usually self-resolving pregnancy event — not a sign that the pregnancy itself is in danger. The falling haemoglobin some women see alongside it is the detail your doctor will actually be watching most closely.

When it needs urgent attention

Contact your doctor the same day for heavy vaginal bleeding, a high fever, pain that keeps intensifying rather than easing over a few days, reduced baby movements, or any sign of preterm labour (regular tightening, pelvic pressure, or fluid leakage) — these point away from simple degeneration and need prompt evaluation.

Frequently asked

Does a fibroid degenerating in pregnancy mean surgery is needed?

Almost never during pregnancy itself. Degeneration is managed conservatively — rest and pain relief — and surgery on a fibroid is generally avoided during pregnancy because of the bleeding risk it carries at this stage, reserved only for the rare situation where it's unavoidable.

Can this happen more than once in the same pregnancy?

It can, particularly with larger fibroids, since the same growth-outpacing-blood-supply mechanism can recur as the fibroid and the uterus both continue growing. Each episode is generally assessed and managed the same way.

Will the fibroid go back to its pre-pregnancy size after delivery?

Many fibroids do shrink somewhat after delivery as pregnancy hormone levels fall, though not always all the way back to their original size. Whether it then needs monitoring or treatment is a separate conversation for after you've delivered.

Does having a fibroid mean I'm more likely to need a C-section?

Not automatically — it depends on the fibroid's size and, especially, its location relative to the cervix and the baby's position. Your doctor will factor this into the delivery plan as pregnancy progresses, not decide it from the fibroid alone.