Understanding Other Specified Hypersomnolence Disorder Other Specified Hypersomnolence Disorder (OSHD) is a sleep disorder characterized by excessive daytime sleepiness despite getting enough sleep at night. It falls under the umbrella of central disorders of hypersomnolence, along with other conditions like narcolepsy and idiopathic hypersomnia. OSHD is a relatively new diagnosis and was introduced in the […]