Researchers currently believe that stuttering is caused by a combination of factors, including genetics, language development, environment, as well as brain structure and function[1]. Working together, these factors can influence the speech of a person who stutters.

What is the root cause of stuttering?

The roots of stuttering have been attributed to a number of causes: emotional problems, neurological problems, inappropriate reactions by caregivers and family members, language planning, and speech motor difficulties, among others.

When does a stutter develop?

Developmental stuttering.

It usually happens when a child is between ages 2 and 5. It may happen when a child's speech and language development lags behind what he or she needs or wants to say.