Sleep-related painful penile erection is a sleep disorder disorder caused by painful penile erection during sleep. Sleep-associated painful penile erectile dysfunction is most common in people over the age of forty. It is clinically rare, and the percentage of patients with combined sexual and erectile dysfunction is low. Typical symptoms of sleep-associated painful penile erection are pain that can lead to arousal when the penis is partially or fully erect during sleep. Repeated awakenings may lead to deprivation of rapid eye movement like sleep, leading to sleep disorders and further symptoms of nighttime insomnia and excessive daytime sleepiness. If you are diagnosed with sleep-related painful penile erection, you should seek medical treatment promptly. Pay attention to rest on weekdays and avoid overwork.