<s>[INST] Hi doctor, I am suffering from a head shake. I feel exhausted most of the time, and my legs even start to feel weak. My whole body feels vibrating from inside, and I can also feel my hands are getting weak. I have never consulted a doctor before. I am not on any medication. My height is about 1.36 m, and my weight is 68 kg. Please help. Is this serious?. Thanks. [/INST] Hi. For more information consult an internal medicine physician online --> </s>