Why Do Nipples Become Erect? Physiological and Pathological Causes
Physiological Causes
- Cold temperatures: Vasoconstriction increases blood flow, causing erection.
- Hormonal changes: Menstrual cycle (especially ovulation), pregnancy increase sensitivity and erection tendency.
- Sexual arousal: Hormonal/neurotransmitter release increases blood flow.
Pathological Causes
- Paget's disease of the nipple
- Breast cancer
Occasional erection without sexual stimulation is normal. Persistent erection with other concerning symptoms warrants medical evaluation.
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