Complex sleep apnea syndrome, also known as treatment-emergent central sleep apnea, occurs when someone has both obstructive sleep apnea and central sleep apnea. The signs and symptoms of obstructive and central sleep apneas overlap, sometimes making the type of sleep apnea more difficult to determine. International team seeks hidden signs of brain damage in REM behavior disorder ROCHESTER, Minn. — People with rapid eye movement (REM) sleep behavior disorder act out their dreams. While sleeping safely in bed, for example, they might throw up their arms to catch an imaginary ball or try to run from an illusory assailant. Such […] Restless legs syndrome is characterized by an unpleasant or uncomfortable urge to move your legs. Some people describe it as a crawling, pulling or burning sensation in the thighs, calves or feet. The sensation is temporarily relieved when you get up and move around or when you shift or stretch your legs. While restless legs syndrome is most often a chronic condition, treatment is available that often can effectively control its symptoms. Restless legs syndrome is a condition characterized by an unpleasant or uncomfortable urge to move your legs. Some people describe it as a crawling, pulling or burning sensation in their thighs, calves or feet. Restless legs syndrome usually causes sensations that begin or worsen during rest or inactivity, such as lying down or sitting, and worsen in the evening or at night. Although the condition affects the limbs, restless leg syndrome is a neurological disorder triggered by iron deficiency in certain parts of the brain. The discomfort that develops in the arms, back and legs is related to brain malfunction, Dr. Kotagal says. Stiff person syndrome is a rare autoimmune movement disorder. Learn more from a Mayo Clinic expert about this often misdiagnosed illness. However, others are much less certain that pelvic congestion syndrome is a cause of pelvic pain because most women with enlarged veins in the pelvis have no associated pain. Psychological factors. Depression, chronic stress or a history of sexual or physical abuse may increase your risk of chronic pelvic pain. Researchers suspect that restless legs syndrome may be linked to insufficient activity of dopamine in the nervous system. Be aware that certain medications can worsen symptoms of restless leg syndrome, including over-the-counter sleep aids that contain diphenhydramine, selective serotonin reuptake inhibitors and anti-nausea drugs. That's restless legs syndrome, a genetic disorder that Dr. Kotagal says is more common in children than you might think. Studies show that 1 in 50 kids have the condition, a discomfort that can prevent a child from falling asleep and repeatedly wake a child during sleep.