Night splints are a widely used treatment for plantar fasciitis and are designed to keep the foot in a upward-flexed position during sleep. This assists elongate the fascia of the foot, Achilles and muscles in the calves, which can alleviate morning pain and facilitate improvement. https://www.foothealthfriday.com/how-do-you-use-night-splints-for-plantar-fasciitis/