Parents are often frightened when they notice their child's hands shaking. However, this symptom rarely indicates a serious underlying condition. If the shaking continues for several days or continues coming back, a visit to your Pediatrician would be a good idea to get this further evaluated.. There are several possible causes of shaking or tremor in the hands including:

Anxiety

Many children, especially very young kids, struggle to express their feelings verbally. Instead, their emotions may manifest physically. If your child is experiencing anxiety, her body may tense up and then begin shaking. Encourage your child to talk about her feelings and, if the anxiety continues, consult your pediatrician.

Hunger

Malnourishment, skipped meals and simple hunger can all cause low blood sugar. When the blood sugar remains low, children may experience tremors in their hands. Encourage your child to eat a healthy, balanced diet.

Overactive Thyroid

An overactive thyroid is a condition in which an individual's metabolism is faster than normal which means they burn fat and energy quickly. Tiredness and weight loss are other symptoms of an overactive thyroid.

Caffeine

High doses of caffeine frequently cause hand tremors in adults. Children are even more susceptible to the effects of caffeine, and even one soda is enough to induce a tremor. Caffeine is not a healthy choice for children, and may stunt growth. Give your child water and unsweetened juice instead of soda and tea.

Muscle Problems

Because tremors are caused by involuntary muscle movements, some muscle problems increase the likelihood of tremors. Muscular weakness and exhaustion are especially likely to cause shaking hands.

Tourette's syndrome

Tourette's syndrome is a central nervous system disorder that causes twitching, uncontrolled movements of the body, and vocal outbursts such as yelling, grunting, or throat clearing. These symptoms are called tics. If they are tired, excited, upset, or angry, the tics can worsen.

Finally, a definite diagnosis can only be reached by a doctor talking to your child, finding out if he/she has any other symptoms, carrying out a physical examination and possibly doing investigations such as blood tests.




Source:
LiveStrong