9 Reasons Why Your Hands Are Shaking

Having way too much caffeine, nicotine, or some other stimulant can also make your hands shake.Just like excessive fatigue, having too much caffeine can enhance a normal physiologic tremor. Nicotine can do the same thing. This comes down to their nature as stimulants, Dr. Feigin explains. Since factors like your heartbeat can cause an enhanced physiologic tremor, overdoing it on stimulants that affect those processes might make your tremor more noticeable.