If you or a loved one has experienced a tonic clonic seizure, you are not alone. Seizures are a common health condition, but they can be dangerous. This is because they cause a temporary loss of consciousness. They can also lead to serious injuries. Tonic-clonic seizures can be treated by surgery and drugs. However, it is important to be aware of the symptoms so that you can seek medical attention as soon as possible.One of the best ways to prevent nocturnal seizures is to get enough sleep. Lack of sleep is a common seizure trigger, and sleeping at the wrong times can be just as dangerous.  Seizure Alarms Sleep apnea is also a risk. Having a full diagnosis can help you rule out other potential causes of your troubling nighttime symptoms.There are two types of tonic clonic seizures. The first involves the clonic phase, which is characterized by jerking or twitching movements. It may last a few minutes or may be followed by the tonic phase. These jerking movements can be seen in the eyes, arms, legs, and mouth.While the clonic phase is the most common type of tonic clonic seizure, there are a handful of other types. Some of them can be life-threatening. For instance, a grand mal (or GM) seizure can result in a severe headache. You can also experience loss of bowel or bladder control during a seizure.Although there is no cure for epilepsy, controlling the frequency of seizures can greatly reduce your chances of enduring any complications. A neurologist can assess your medical history, recommend the best medications for your particular needs, and make changes to your daily routine if needed.