The resulting "shock" is caused by muscles twitching uncontrollably, appearing as muscle spasms. Signs of poisoning include weakness, vomiting, dyspnea, twitching, stupor, and convulsions. Elevated temperature, profuse sweating, uncoordinated movement, muscle twitching, and coma are additional side effects. Other symptoms may include increased irritability, vomiting, diplopia, seizures, twitching and myoclonus of the limbs. Many would be tossing, rolling, moaning, twitching, spasming or thrashing around. Other ongoing mild effects may include restlessness, muscle weakness, twitching, and anxiety. These signs included coughing, gasping, colour, twitching, and movement. Neuromyotonia refers to muscle twitching and cramping at rest that is exacerbated with exercise. All generally result in worsening muscle weakness associated with muscle twitching. Severe symptoms include confusion, muscle twitching, and bleeding in or around the brain. He has mild Tourette syndrome resulting in noticeable twitching of his eyebrows. Facial nerve avulsion is used to treat the involuntary twitching involved in benign essential blepharospasm. Low levels of calcium can result in twitching muscles, or seizures. Common symptoms include pain, intense tears, eyelid twitching, discomfort from bright light, and constricted pupils. More severe symptoms ensue, including confusion, muscle twitching, and bleeding in or around the brain.