Sciatica is usually diagnosed using a two-pronged approach: physical examination and possibly certain imaging testing
Physical Examination:
The location and severity of your pain
Whether you have any numbness, tingling, or weakness in your leg.
Straight Leg Raise test: For this exam, you will lie on your back with one leg bent and the other straight. The straight leg will be slowly raised by your doctor. Sciatica may be the cause if you have back or leg discomfort that travels down your leg and buttocks when your leg is lifted between 30 and 70 degrees.
Slump test: This test involves sitting upright with your arms outstretched in front of you. Your doctor will then ask you to slowly bend forward from the hips, keeping your back straight. If you experience pain in your back or leg that radiates down your buttocks and leg when you bend forward, this may indicate sciatica.
Medical Imaging tests include MRI Scans, CT Scans and X ray.
It's crucial to remember that not every sciatica sufferer will require every test. Based on your unique situation, your doctor will advise you on the tests that are most suited for you.