2 doctors weighed in:

Having sex causes siatic nerve back pain why?

2 doctors weighed in
Dr. Jay Rosenfeld
Physical & Rehabilitation Medicine

In brief: Yes

I see many patients with back pain and sciatica who report increased pain during sex.
If your back is sore or inflamed and the nerves are sensitive, the motion of sex may aggravate your symptoms. Having said that, i never tell my patients not to have sex only to experiment with different positions that may not cause pain or to avoid positions that cause pain during the act. This typically improves.

In brief: Yes

I see many patients with back pain and sciatica who report increased pain during sex.
If your back is sore or inflamed and the nerves are sensitive, the motion of sex may aggravate your symptoms. Having said that, i never tell my patients not to have sex only to experiment with different positions that may not cause pain or to avoid positions that cause pain during the act. This typically improves.
Dr. Jay Rosenfeld
Dr. Jay Rosenfeld
Thank
Dr. J. Yusuf Erskine
Holistic Medicine

In brief: Strain/ instability

Certain sexual positions can aggravate an underlying sciatic nerve or lumbar disc problem. If this is new symptom it should be evaluated by a competent clinician.
If chronic and documented, then you can pay attention to what positions aggravate and what positions allow you to have pleasure without subsequent pain. If worsens see your physician.

In brief: Strain/ instability

Certain sexual positions can aggravate an underlying sciatic nerve or lumbar disc problem. If this is new symptom it should be evaluated by a competent clinician.
If chronic and documented, then you can pay attention to what positions aggravate and what positions allow you to have pleasure without subsequent pain. If worsens see your physician.
Dr. J. Yusuf Erskine
Dr. J. Yusuf Erskine
Thank
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