Plantar Fasciitis

Plantar fasciitis describes pain from the plantar fascia, the strong band of tissue that supports the arch and attaches to the underside of the heel bone. The condition is usually a load-related fascia problem: repeated tension, calf tightness, footwear changes, or sudden activity increases irritate the fascia attachment and create the familiar first-step heel pain.

This condition page focuses on recognizing plantar fasciitis and separating it from other causes of heel pain. The related plantar fasciitis treatment page covers the treatment sequence in more depth. At Mountain Spine & Orthopedics, foot and ankle evaluation starts by confirming whether the plantar fascia is truly the pain generator or whether another heel condition is being missed.

The most recognizable symptom is a sharp or stabbing pain on the bottom-inside part of the heel with the first steps after sleep or after sitting. The pain may loosen after several minutes, then return after prolonged standing, walking, or impact activity.

• Point tenderness where the fascia attaches to the heel
• Arch tightness or pulling with toe extension
• Pain after activity rather than only during activity
• Symptoms that flare in unsupportive shoes or barefoot on hard floors
• Less typical symptoms, such as burning, tingling, bruising, or constant night pain, which may suggest another diagnosis

• Calf tightness: Limited ankle flexibility increases tension on the fascia
• Foot structure: Flat feet, high arches, or excessive pronation can concentrate heel load
• Training changes: New running volume, hill work, speed work, or jumping can overload the fascia
• Work demands: Long shifts standing on hard floors increase repetitive loading
• Footwear: Worn shoes, minimal cushioning, or poor arch support can aggravate symptoms
• Body weight and age: Higher load and reduced tissue elasticity can make the fascia less tolerant of stress

Diagnosis is usually made from the symptom pattern and exam. The key finding is focal tenderness at the plantar fascia origin, often reproduced when the toes are pulled upward or the calf is stretched.

Imaging is used when symptoms are atypical, severe, traumatic, or not improving. X-rays may show heel spurs but spurs alone do not prove the diagnosis. Ultrasound or MRI can evaluate fascia thickening, partial tearing, stress fracture, fat-pad atrophy, Baxter's nerve entrapment, tarsal tunnel syndrome, Achilles insertional pain, and inflammatory arthritis. A complimentary MRI review can help clarify difficult cases.

Most plantar fasciitis begins with load reduction, footwear support, calf and fascia stretching, and activity changes. Injections, biologic options, shockwave therapy, or surgery are considered only when the diagnosis is clear and symptoms remain function-limiting despite a reasonable course of non-surgical care.

Because this page is focused on the condition and diagnosis, patients looking for a full care pathway can review our plantar fasciitis treatment page.

The hallmark first-step pain happens because the fascia tightens while the foot is at rest, then is suddenly loaded when standing. Pain that is mostly burning, numb, located at the back of the heel, triggered by every step without warm-up, or associated with swelling after trauma may point away from plantar fasciitis.

Accurate diagnosis matters because a stress fracture, nerve entrapment, fat-pad problem, Achilles disorder, or inflammatory arthritis can require a different treatment plan.

Risk reduction centers on improving the tissue's tolerance for load.

• Increase walking, running, and standing demands gradually
• Use supportive footwear for long shifts or high-impact activity
• Replace worn shoes before cushioning and support break down
• Maintain calf flexibility and ankle mobility
• Address recurring arch, knee, hip, or back mechanics that change foot loading
• Seek evaluation when heel pain changes character or stops improving

If first-step heel pain, arch tightness, or persistent bottom-of-heel pain is limiting your activity, schedule a consultation with Mountain Spine & Orthopedics. Bring prior imaging or request a complimentary MRI review if symptoms have not followed the typical plantar fasciitis pattern.