I am 38 years old,168cm,65kg & no health problem so far. My hands shaking since I was teenage but not as great as recently. I found my hands shaking when I am doing works like lifting or carrying my daughter up or holding things in stagnant position. I still can write& my writings are normal. I had my medical checkup yearly, includingfull blood, lung, kidney & cholestrol profiling, thyroid test , breath test & lung capacity. All test results were normal. I did neck to abdomen ultrasound scanning before, glands & organs are healthy. Is my hand shaking normal body response or any sickness on my body?