From time to time, this everyday level of tremor can increase so that it becomes more noticeable. Occasional noticeable tremor is common in people of all ages, and very common in older people, and does
not necessarily mean that you have any sort of medical condition. It can be caused by tiredness, stress, anxiety, or anger. A raised level of adrenalin in your body, which can happen when you become excited or angry, can often cause a noticeable tremor.