Causes of phobias

Most phobias don’t have a single cause and are often a complex interplay of factors.

These may include:

• Genetics: There may be a genetic component to the predisposition to developing specific phobias, though this isn’t clearly understood.
• Chemical imbalance: Some research suggests that an imbalance of certain brain chemicals, known as neurotransmitters, may also contribute to specific phobias but further research is needed to understand this relationship.
• Experiences: Traumatic or upsetting experiences may contribute to the development of a specific phobia. For example, a traumatic experience with dogs may lead to developing cynophobia, the fear of dogs.
• Learned behaviours: Phobias may be influenced by behaviours learned or observed in childhood. For example, having a parent who has arachnophobia, or the fear of spiders, may lead to developing that same phobia.
• Informational learning: Some phobias may come from learning about dangerous or frightening events. For example, reading about a death by spider bite may lead to developing arachnophobia, or hearing about a plane crash may lead to developing a fear of flying.
• Drug use: Some drugs and substances, such as caffeine or alcohol, may make some people more anxious than others.
• Physical ill health: There is an increased risk of someone developing a phobia if they experience ongoing physical illness. Additionally, those who experience traumatic brain injuries have an increased likelihood of developing a phobia.