Splints for nighttime use are a widely used method for foot pain and are intended to keep the foot in a dorsiflexed position while sleeping. This aids loosen the plantar fascia, Achilles tendon and muscles in the calves, which can alleviate pain upon waking and encourage improvement. https://www.foothealthfriday.com/how-do-you-use-night-splints-for-plantar-fasciitis/