See a physical therapist for sciatica if the pain has lasted more than a week or two without improving, if it keeps returning, if you have numbness or weakness in the leg, or if it is limiting work, sleep, or daily activity. Some sciatica settles on its own within a few weeks. Some does not, and waiting it out has a cost. Below is how to tell the difference — and which symptoms mean go now, not later.

Symptoms that need emergency care

Go to an emergency department immediately, rather than scheduling therapy, if you have any of the following:

• Loss of bladder or bowel control, or new difficulty urinating
• Numbness in the groin or inner thighs — the area that would contact a saddle
• Weakness in both legs, or rapidly worsening weakness in one
• Sciatica following significant trauma such as a fall or collision
• Severe back or leg pain with fever or unexplained weight loss

These are uncommon, but they can indicate conditions where delay causes permanent harm. Physical therapy is not the right first stop for any of them.

When is it reasonable to wait?

If your sciatica came on recently, is improving week over week, does not involve weakness, and you can still move around and sleep reasonably, it is reasonable to give it a short period of relative rest and gentle movement first. Staying active generally produces better outcomes than bed rest.

What should prompt you to stop waiting: no improvement after a couple of weeks, pain that is getting worse rather than better, numbness or weakness developing, or a pattern of sciatica that keeps coming back.

Why recurring sciatica is worth addressing

Sciatica that resolves and returns repeatedly is usually telling you something about how your back is being loaded — how you sit, lift, move, and which muscles are and are not doing their job. Each episode may pass on its own, but the underlying pattern does not change unless something changes it.

This is where physical therapy differs from simply managing flare-ups. The goal is not only to calm the current episode but to reduce the likelihood of the next one.

What does physical therapy for sciatica involve?

An evaluation typically establishes where the nerve irritation is coming from and which movements ease or worsen it. Treatment commonly includes:

• Directional preference exercises — finding the specific movements that reduce your leg symptoms and using them deliberately
• Nerve mobility work to restore normal gliding of the irritated nerve
• Manual therapy for joint and soft tissue restriction
• Core and hip strengthening to reduce load on the irritated segment
• Education on positioning for sitting, driving, sleeping, and lifting
• Graded return to activity rather than indefinite avoidance

Do I need an MRI first?

Usually not. Imaging is important when there are red flag symptoms, when weakness is progressing, or when surgery is being considered. For typical sciatica, imaging findings often do not correlate well with symptoms — disc changes are common in people with no pain at all — and early imaging has not been shown to improve outcomes.

Your physician makes that call. It is simply not a prerequisite for starting therapy.

Do I need a referral to start physical therapy in Tennessee?

Tennessee allows patients to begin physical therapy without a physician referral, though there are conditions and limits on how long treatment can continue before a referral is required, and your insurance plan may have its own requirements regardless of state law.

The practical answer: call the clinic and ask. We can tell you what applies to your situation and your plan before you book.

Sciatica treatment in East Tennessee

Tristar Physical Therapy treats sciatica at all eight of our East Tennessee clinics: Morristown, Maryville, Johnson City, Newport, Bean Station, Jefferson City, Rogersville, and New Tazewell.

For a fuller overview of how we approach these symptoms, see our page on back pain and sciatica relief. Some patients also benefit from dry needling as part of a broader plan.

Find your nearest Tristar clinic or request an appointment.

Reviewed by the Tristar Physical Therapy clinical team. This article is general education and is not a substitute for individual medical advice. Seek emergency care for the red flag symptoms described above.