A 19-year-old female asked:
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my leg went numb after having sex this morning. it is evening and still numb. what is the cause of this?

2 doctor answers
Dr. Stuart Winkler
47 years experience Nephrology and Dialysis
Numb leg: There is no association between having sex and numbness in the leg. It is possible that you have some underlying nerve impingement in your back and that the position you assume during sex may aggravate this. You should have this checked out. You should change your position during sex.
Answered on Apr 18, 2016
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Dr. Laurence Badgley
52 years experience General Practice
Most unusual: 19y female C/O "leg going numb" while having sex, & lasting for several hours. This is an odd symptom. Perhaps she has Hypermobility Syndrome, which imparts joint instabilities. Missionary sex position leverages femur, forcing Sacroiliac Joints, largest joints in axial spine, into hyperextension & impingement of pre sacral plexus. Pre-sacral plexus is "headwaters" region of the sciatic nerve.
Answered on Nov 6, 2015

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