Fainting in 18-Month-Olds: Causes, Symptoms & When to Seek Help

A 1-year-old child may faint for several reasons. Common reasons include:

• Vasovagal syncope (“fainting spell”): This is the most common cause of fainting. It occurs when a person's brain and body do not communicate effectively, causing a temporary drop in blood pressure. In toddlers, vasovagal syncope is often triggered by sudden changes in position or emotion, such as being startled or when going from a standing to a sitting position.

• Febrile seizures: A febrile seizure is a seizure that occurs with a high fever in children between 6 months and 5 years of age. Febrile seizures are usually harmless and do not cause any long-term problems.

• Head injuries: A head injury can cause a concussion or other type of brain damage, leading to fainting.

• Heart conditions: Certain heart conditions, such as arrhythmia or valve disorders, can cause fainting in children.

• Medications: Some medications can cause side effects such as dizziness, lightheadedness, or fainting.

• Anemia: Anemia is a condition in which the blood does not carry enough oxygen to the cells. This can lead to fatigue and weakness, which can sometimes cause fainting.

• Low blood sugar: Low blood sugar can lead to lightheadedness, weakness, and fainting.