Heel spurs are typically caused by inflammation resulting from the stretching of the plantar fascia, a thick band of tissue on the sole of the foot, or micro-tears in the membrane covering the heel bone. This inflammation can lead to the accumulation of calcium deposits, which over time develop into a bony protrusion known as a heel spur.

Common contributing factors and risk factors for heel spurs include:

* Excessive Strain and Overuse: Activities involving repetitive stress on the heel, such as running or walking on hard surfaces, especially without proper footwear, can strain the plantar fascia. Both excessive activity and prolonged inactivity can contribute.
* Foot Mechanics and Biomechanics: Conditions like flat feet, high arches, or abnormal gait patterns that place undue pressure on the heel can increase susceptibility.
* Improper Footwear: Wearing shoes that lack adequate arch support, cushioning, or are ill-fitting (e.g., rigid-soled shoes, frequent use of flip-flops, or incorrect athletic shoes) can exacerbate stress on the heel.
* Weight and Lifestyle Factors: Obesity or significant weight gain increases the load on the heels, straining the plantar fascia. Occupations requiring prolonged standing also elevate risk.
* Underlying Medical Conditions: Certain systemic diseases like diabetes and arthritis can contribute to the development of heel spurs.
* Acute Injuries: Direct trauma or injuries to the heel bone or surrounding ligaments can also trigger the condition.