Sciatica and psoriatic arthritis: what to know

Sciatica commonly travels from the lower back or buttock down one leg and may include burning pain, tingling, numbness or weakness. It reflects irritation of a nerve root. Psoriatic arthritis is an inflammatory condition affecting joints and tendon attachments. People with it may notice [Joint Pain](/symptoms/joint-pain/), [Joint Swelling](/symptoms/joint-swelling/) or [Morning Joint Stiffness](/symptoms/morning-joint-stiffness/), sometimes with swollen fingers or toes.

Inflammation around the pelvis or spine can feel similar to back or buttock pain, yet it does not automatically explain nerve symptoms. The location, timing, skin and nail symptoms, examination and response to movement help clinicians distinguish overlapping causes.

Record where pain travels, whether joints swell, how long morning stiffness lasts, and whether coughing or sitting changes leg symptoms. A clinician may coordinate rheumatology and musculoskeletal care. Treatment can include disease-directed care for psoriatic arthritis, symptom relief such as [Anti-Inflammatory Medication](/treatments/non-surgical-orthopedics/anti-inflammatory-medication/), and tailored [Physiotherapy](/treatments/physiotherapy-and-rehabilitation/physiotherapy/). Do not start or stop medication without advice.

Seek prompt assessment for new weakness, worsening numbness, severe pain, a hot swollen joint, or symptoms that limit walking. Emergency care is needed for new loss of bladder or bowel control, numbness around the inner thighs, or rapidly worsening weakness.

Ask whether the pattern suggests nerve-root irritation, inflammatory spinal or joint disease, or both. Ask which examination or imaging is needed, how medicines interact, and which exercises are appropriate during a flare.