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. Plantar fasciitis night splints are very effective and are worn while sleeping to alleviate heel pain due to plantar fasciitis. Rollers such as the Foot Log or Plantar Fasciitis Massage Balls, help roll out tightness in the arch and promote flexibility.