Symptoms may include diarrhea, headache, nausea and vomiting, dizziness, tachycardia, malaise, and myalgia. Some symptoms include fever, myalgia, malaise, and edema. Symptoms of muscle diseases may include weakness, spasticity, myoclonus and myalgia. Patients with meningitis may have a stiff neck, fever, headache, myalgia, nausea and malaise. Aftereffects may include neurasthenia, cardiac disturbances and myalgia. Symptoms included extreme fatigue, nausea, a decline in physical activity ability and myalgia. The peracute form is characterized by recumbency, tachypnea, dyspnea, myalgia, cardiac arrhythmias, and rapid death. Heat therapy is useful for muscle spasms, myalgia, fibromyalgia, contracture, bursitis. The symptoms are occipital headache, cough, middle ear effusion, cervical myalgia, halitosis ie bad breath. Statins may sometimes cause myalgia and cramps among other possible side effects. Phenotypes of the condition include encephalopathy, epilepsy, dystonia, hypotonia, myalgia, exercise intolerance, and more. It is typically characterized by fever, headache, myalgia and possibly intensification of skin rash. Symptoms of colchicine toxicity include gastrointestinal upset, fever, myalgia, pancytopenia, and organ failure. The initial symptoms are nonspecific fever, weakness, and myalgia among others. Although myotonia in itself is not normally associated with pain, cramps or myalgia may develop.