What are the possible causes of pain in the left inner thigh?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Left inner thigh pain often stems from underlying conditions such as May-Thurner syndrome, which compresses the left iliac vein, or a psoas abscess that spreads infection into the thigh muscles. Other common causes include muscle strains, hernias, nerve compression, and hip joint issues. Because symptoms can overlap across many conditions—some serious—identifying the true cause quickly matters.

If you're experiencing left inner thigh pain, don't guess. Take a free, instant, online symptom check to get personalized insights into possible causes and clear guidance on your next steps. It's a fast, confidential way to understand your body better and decide whether home care, a doctor's visit, or urgent evaluation is right for you.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Pain in the left inner thigh can have different causes. One possible cause is May-Thurner syndrome, a condition where veins in the pelvis are compressed, leading to pain and swelling in the leg. This condition can be managed using special medical procedures.

Another potential cause is a psoas abscess, which is an infection near the spine that can extend to the muscles of the thigh. This can cause pain and discomfort in the inner thigh area. Treatment often involves antibiotics or drainage.

If you are experiencing pain in your thigh, you can use our free symptom checker to help identify potential causes before talking to a healthcare provider about appropriate treatment.

(References)

Iwasaka-Neder J, Bedoya MA, Tsai A, & Bixby SD. (2024). Case 326. Radiology, 38411515.
Nguyen TTH, Nguyen DA, To LK, Nguyen MPC, Nguyen HT, & Nguyen HQ. (2024). May-Thurner syndrome managed with catheter-directed .... Radiology case reports, 39220779.
Zhou Z, Song Y, Cai Q, & Zeng J. (2010). Primary psoas abscess extending to thigh adductors. BMC musculoskeletal disorders, 20691069.

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