Most of us have experienced a sleepless night at some point in our lives. But for some people, consistent lack of sleep is a serious problem. It might just be because of a stressful time, or one of these common sleep disorders. Signs and symptoms of insomnia may include difficulty falling asleep at night, regularly waking up during the night, waking up too early, and waking up feeling tired, even after a full night's sleep. Sleep Apnea. Apnea means without breath. When you have sleep apnea, it means you actually stop breathing during sleep. That lack of breath can lasts at least ten seconds, and lead to serious problems including Hypertension, heart disease, mood and even memory disorders. Sleep Apnea happens when the muscles in the back of the throat aren’t able to keep the throat open. Bruxism is the medical term for clenching your teeth. Some people clench their teeth together during the day without even knowing it, usually when they feel anxious or tense. But people with bruxism often grind and clench their teeth during sleep too, and that can cause headaches, jaw pain and earaches. For most, dreams are purely a mental activity that occurs when the body is at rest. Even during a vivid or action-packed dreams, their bodies are still. But people who suffer from REM behavior disorder or RBD they may actually act out their dreams. They move their arms and legs in bed, they talk in their sleep or they can get out of bed all together. That’s because people with RBD lack the normal muscle paralysis of REM sleep. The disorder usually begins with twitching and talking and jerking during their dreaming for years and then they fully act out their dreams. Sometimes the dreams are violent, and, when acted out, can harm the sleeper or his or her bed partner. Restless legs syndrome (RLS) is characterized by an uncontrollable urge to move your legs. It's a neurological condition that's at its worst when you're resting. Symptoms include burning, creeping and tugging sensations and can be very painful. In most cases, there is no known cause for restless legs syndrome. Researchers suspect the condition may be due to an imbalance of the brain chemical dopamine. Narcolepsy. This is a chronic sleep disorder characterized by overwhelming fatigue and sudden attacks of sleep. Though it’s often mistaken for depression, seizures, and fainting, narcolepsy is a chronic condition. Though there isn’t a cure, medications and lifestyle changes can help you cope.