<s>[INST] Hi, when i concentrate or focus or sometimes when im tired my hands start to shake and i cannot do anyhing properly. I may try to draw really carefully or squeeze something or write slowly or concentrate hard but my hands start to tremble/shake. Should I be worried about this? [/INST] Hello, Consult a neurologist and get evaluated. We have to rule out possible causes like essential tremor and Parkinson’s. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Shinas Hussain, General & Family Physician </s>