All guides

Movement

Cycling, sports, and pressure

How the perineum, nerves, blood vessels, and urethra can be affected by pressure or a straddle injury.

Evidence checked July 15, 2026 · Editorially reviewed, not clinician-reviewed
An adult cyclist adjusting saddle height and bike fit to reduce pressure and improve comfort.
Educational illustration — not a diagnostic image
In 20 seconds

The perineum sits between the genitals and anus and carries nerves and blood vessels involved in urination and erections. Long pressure can cause numbness; a sudden straddle impact can injure deeper tissue or the urethra.

01

What to know

  • Genital numbness during a ride is a signal to change position, fit, pressure, or duration, not something to ignore.
  • Blood at the urethral opening, inability to urinate, major bruising, or severe swelling after a fall needs urgent evaluation.
  • A bike fit or saddle change may help recurring pressure, but persistent symptoms still need a healthcare assessment.
What people often get wrong

A similar-looking photo or one matching symptom cannot confirm a cause. Timing, change, examination, and sometimes testing matter.

02

Useful next steps

  • Stop riding or training when numbness, pain, or swelling begins.
  • After a minor pressure episode, note how long sensation takes to return and whether urination or erections changed.

When to get care

Do not rely on guesswork when the pattern changes.

  • Get urgent care after a major straddle injury, especially with blood, swelling, severe pain, or urinary difficulty.
  • Arrange routine care for recurring numbness or changes in sexual or urinary function.
Use the Concern Navigator →

03

What a clinician may ask

  1. When did you first notice it, and is it changing?
  2. Is there pain, discharge, bleeding, fever, urinary change, or loss of function?
  3. Were there recent medicines, illness, injury, sexual contact, products, or procedures?
Build an appointment note →