Overnight splints are a frequent therapy for heel pain and are intended to keep the foot in a dorsiflexed position while sleeping. This helps extend the tissue on the bottom of the foot, calf tendon, and gastrocnemius, which can reduce early morning discomfort and facilitate healing. https://www.foothealthfriday.com/how-do-you-use-night-splints-for-plantar-fasciitis/