What would cause a toddler to twitch his shoulder and arm?

* Muscle spasm: A muscle spasm is a sudden, involuntary contraction of a muscle. In toddlers, muscle spasms are often caused by overheating, dehydration, or a lack of calcium or potassium.

* Tics: Tics are involuntary, repetitive movements or sounds. They are common in toddlers and usually go away on their own. However, if tics are severe or interfere with your child's daily activities, it is important to see a doctor.

* Seizures: Seizures are episodes of abnormal electrical activity in the brain. They can cause a variety of symptoms, including twitching, shaking, and loss of consciousness. Seizures can be caused by a variety of factors, including epilepsy, head injury, and infection.

* Cerebral palsy: Cerebral palsy is a group of disorders that affect movement and coordination. It is caused by damage to the brain that occurs before or during birth. Symptoms of cerebral palsy can include twitching, shaking, muscle stiffness, and difficulty with speech and swallowing.

* Other medical conditions: In some cases, twitching in the shoulder and arm can be caused by other medical conditions, such as nerve damage, thyroid problems, or drug side effects.

If you are concerned about your toddler's twitching shoulder and arm, it is important to see a doctor for a diagnosis.