Track Tendon & Heel Pain

Note which tendon or spot hurts (back of the heel, underneath the heel, or elsewhere such as the knee or elbow), the severity, and crucially the pattern: was it worst in your first steps out of bed and easing with movement, or did it build up during or after activity? Record how long any morning stiffness lasted, what you were doing in the hours or days before (a run, a new pair of shoes, a long shift standing), and anything that helped, ice, stretching, rest, or a brace. If you have psoriasis, back pain, or gut symptoms, log those too, since they change how the pain should be read. Consistent notes across flares are what let a clinician spot a pattern instead of one isolated complaint.

No. Plantar fasciitis, pain under the heel where the plantar fascia originates, is the single most common cause, but it is not the only one. Pain at the back of the heel is more often Achilles tendinopathy, irritation or degeneration of the Achilles tendon itself or its insertion into the calcaneus. Enthesitis from psoriatic arthritis or axial spondyloarthritis can mimic either location and often affects both heels or several entheses at once. Children and active adolescents can develop Sever's disease, irritation of the heel's growth plate, and older adults sometimes have simple fat pad thinning. Tracking which side, which exact spot, and what else is going on helps narrow down which of these you are actually dealing with.

Both cause pain where a tendon meets bone, but the mechanism differs. Tendinopathy is a local, mechanical overuse injury, repeated strain, from running, a mileage jump, or new footwear, causes microscopic tendon damage and a reactive, degenerative process in the tendon tissue itself. Enthesitis is inflammation at the entheses, the specific attachment points of tendons and ligaments to bone, and it is driven by the immune system rather than mechanical wear, most often as part of axial spondyloarthritis or psoriatic arthritis. The clues that separate them are pattern and company: enthesitis tends to produce first-steps pain with prolonged morning stiffness, often at several sites and sometimes both heels, and it travels with back pain, psoriasis, or gut symptoms. Tendinopathy is usually one-sided, tracks with a specific activity, and improves steadily with reduced load. Tracking both the pattern and any accompanying symptoms is the fastest way to tell a clinician which one you're more likely dealing with.

See a doctor promptly if you feel a sudden pop at the back of the heel and can't rise onto your toes, if the area is hot, red, or swollen with fever, or if you notice numbness or tingling in the foot. Book a routine but timely appointment if the pain has lasted more than a few weeks despite rest and stretching, if morning stiffness runs past 30 minutes, or if it appears alongside back pain, psoriasis, eye redness, or gut symptoms, these combinations point toward an inflammatory cause like spondyloarthritis or psoriatic arthritis and often benefit from a rheumatology referral. Runners with a new or worsening ache that doesn't settle with reduced load should also get it checked before it becomes a chronic tendinopathy. Bringing a log of when the pain is worst and what triggers it helps your clinician get to the right diagnosis faster.

Yes, both are recognized, underappreciated contributors. If your joints are unusually flexible, including hypermobile Ehlers-Danlos syndrome or generalized joint hypermobility, your tendons and ligaments tend to be more compliant, which means load through the ankle and foot is distributed less efficiently and tendons can be worked harder than they look like they should be, raising the risk of tendinopathy and slower healing. Separately, fluoroquinolone antibiotics, common brand names include ciprofloxacin and levofloxacin, carry a well-documented risk of tendon inflammation and, rarely, rupture, most often affecting the Achilles tendon, with higher risk in people over 60, on corticosteroids, or with a history of kidney or organ transplant. If heel or tendon pain starts within days to weeks of starting one of these antibiotics, mention it to your prescriber, and discuss with your clinician before starting one if you have hypermobility or a prior tendon injury.