Diseases & care
Plantar fasciitis and heel pain explained
Plantar fasciitis is the most common cause of pain under the heel. It happens when a tough band of tissue along the sole of the foot becomes irritated and inflamed where it attaches to the heel bone. The pain is typically worst with the first steps in the morning or after resting. It can be persistent and frustrating, but the great majority of cases improve with simple self-care over time. This guide explains, in plain terms, what plantar fasciitis is, its symptoms, how it is diagnosed and how it is managed. It is general education, not personal medical advice.
Education and reference only. This article explains how treatments work in plain language — it contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician.
What plantar fasciitis is
The plantar fascia is a strong, fibrous band of tissue that runs along the sole of the foot, connecting the heel bone to the base of the toes and helping to support the arch. Every time you stand, walk or run, this band takes strain as it supports your weight and springs the foot forward. In plantar fasciitis, the fascia becomes irritated, strained and inflamed, most often at the point where it attaches to the heel bone, which is why the pain is felt under or just in front of the heel. Despite the name suggesting simple inflammation, the tissue in longer-standing cases shows wear and small changes from overload rather than a raging inflammation. It is essentially an overuse or overload problem of the sole's support band, and it is very common, especially in middle age.
The symptoms it causes
The hallmark of plantar fasciitis is pain under the heel, often described as sharp, bruise-like or stabbing. A very characteristic feature is that the pain is worst with the first few steps in the morning, or after sitting still for a while, and then eases a little as you get moving, only to worsen again after being on your feet for a long time or towards the end of the day. The tender spot is usually on the underside of the heel, sometimes spreading into the arch. Standing on hard surfaces, walking barefoot, climbing stairs or wearing unsupportive shoes tends to make it worse. It usually affects one foot but can affect both. The pain can make walking uncomfortable and limit activities, but it does not usually cause the foot to give way or look deformed.
What causes it and who gets it
Plantar fasciitis usually results from repeated overloading of the plantar fascia. Common contributing factors include a sudden increase in walking, running or standing, especially on hard surfaces, and taking up new activity too quickly. Being overweight adds to the strain, and it is more common in middle age. The structure and flexibility of the foot and ankle matter too: tight calf muscles and a tight Achilles tendon, very flat or very high arches, and reduced ankle movement can all increase the load on the fascia. Wearing worn-out or unsupportive shoes, or spending long periods standing at work, are frequent triggers. A small bony spur is sometimes seen on the heel on X-ray, but this is often a result of the long-term strain rather than the cause of the pain, and many people with spurs have no symptoms at all.
How it is diagnosed
Plantar fasciitis is usually diagnosed from the typical story and a simple examination, without the need for scans. A clinician will ask about the pattern of pain, particularly whether it is worst with the first steps in the morning and after rest, and about activities, footwear and any recent change in exercise. They will examine the foot, pressing on the underside of the heel to find the tender spot, checking the flexibility of the calf and ankle, and looking at the shape of the foot and how you walk. In most cases this is enough to make the diagnosis. Imaging such as an X-ray or ultrasound is only needed if the diagnosis is unclear, if the pain does not improve as expected, or to rule out other causes of heel pain such as a stress fracture, a trapped nerve or an inflammatory condition.
How it is managed
The good news is that most people improve with simple self-care, although it can take several months and patience is needed. Helpful measures include resting from activities that aggravate the pain while staying gently active, and regularly stretching the calf muscles and the sole of the foot, which is one of the most effective steps. Wearing supportive, cushioned shoes with a slight heel, avoiding walking barefoot on hard floors, and using soft heel pads or arch supports can ease pressure on the fascia. Losing excess weight helps reduce the load. Simple pain-relief measures and applying an ice pack to the tender heel can settle flare-ups. If symptoms persist despite these steps, a physiotherapist can guide a tailored programme, and other treatments such as specific insoles, a steroid injection or, rarely for very stubborn cases, further options may be considered under specialist advice.
In short
Key takeaways
- Plantar fasciitis is the most common cause of heel pain, from irritation of the tissue band along the sole where it meets the heel.
- The classic symptom is heel pain that is worst with the first steps in the morning or after resting, easing with movement.
- It is often triggered by overloading the foot, tight calves, unsupportive shoes, standing a lot or being overweight.
- It is usually diagnosed from the symptoms and examination, without needing scans; heel spurs are often not the cause.
- Most cases improve over months with stretching, supportive footwear, weight management and simple pain relief.
Answers
Frequently asked questions
Why is the heel pain worse first thing in the morning?
Overnight, while you rest, the plantar fascia and calf tighten and any small strains partly settle. When you take your first steps in the morning, the fascia is suddenly stretched and loaded again, which reproduces the pain sharply. As you move about, the tissue warms and loosens, so the pain often eases, only to return after long periods on your feet. This morning pattern is very characteristic of plantar fasciitis and helps distinguish it from other causes of heel pain.
How long does plantar fasciitis take to get better?
For most people plantar fasciitis improves with simple self-care, but it often takes several months, sometimes up to a year, so patience is important. Regular calf and foot stretches, supportive footwear, easing off aggravating activities and managing weight are the mainstays. The majority get better without injections or surgery. If your pain is not improving after a few months of consistent self-care, it is worth seeing your GP or a physiotherapist to review the diagnosis and consider further treatment.
Does a heel spur cause plantar fasciitis?
Not usually. A heel spur is a small bony growth sometimes seen on X-ray where the fascia attaches to the heel. It tends to form as a result of long-term strain rather than being the source of the pain, and many people with heel spurs have no symptoms at all, while many people with plantar fasciitis have no spur. Treatment therefore focuses on settling the irritated fascia with stretching and support, not on the spur itself.
Go deeper
Related guides
Sources
Where this is drawn from
- National Institute for Health and Care Excellence (NICE). Clinical Knowledge Summaries: plantar fasciitis. 2023.
- NHS. Heel pain and plantar fasciitis: causes and treatment. 2024.
- College of Podiatry (UK). Patient guidance on heel pain and plantar fasciitis. 2022.
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