The most common cause of heel pain is plantar fasciitis. Plantar fasciitis is commonly called "heel spur." Some causes of heel pain include poor arch support, sudden increase in activity and weight gain. Heel cushions, heel cups, arch supports, ice and stretching exercises can be used to help relieve the pain associated with heel spur or plantar fasciitis. Plantar Fasciitis Night Splints are very effective device that are generally worn while sleeping to alleviate heel pain due to plantar fasciitis.