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Heel pain is not usually caused by a single injury, such as a twist or fall, but rather the result of repetitive stress and pounding of the heel. Common causes of heel pain include: A heel pain sufferer commonly feels pain either under the heel (plantar fasciitis) or just behind it (Achilles tendinitis).
Heel pain that you are describing is classic for Plantar Fasciitis. The plantar fascia is a thickened ligament type tissue that spans the bottom of the foot. This area of the foot can become inflamed if overused. Some people are predisposed to this, often based on the arch of the foot.