what might be the cause of onset of social fobia in a 19 year old boy?

http://en.wikipedia.org/wiki/Social_anxiety_disorder

Has the boy been diagnosed with a social phobia? That diagnosis is typically not given unless the symptoms occur over an extended period of time, usually 6 months or more.

If this was not part of his behavior before, and the onset was rather sudden, look for a recent traumatic social interaction as a potential cause. If none can be found, have him see a physician to rule out potential physical causes.

I hope this helps. Thanks for asking.

The onset of social phobia, also known as social anxiety disorder, in a 19-year-old boy can have several possible causes. It's important to note that while I can provide some common factors, it's always recommended to consult with a mental health professional for a comprehensive assessment and diagnosis. Here are some potential causes:

1. Genetic predisposition: There may be a genetic component to social phobia, meaning that individuals with a family history of anxiety disorders could be more likely to develop it.

2. Environmental factors: Experiences in one's upbringing, such as a history of bullying, traumatic events, or a lack of social support, can contribute to the development of social phobia.

3. Biological factors: Some researchers believe that imbalances in certain brain chemicals, such as serotonin or dopamine, could play a role in triggering social phobia.

4. Cognitive factors: Negative thought patterns and beliefs about oneself or others, such as a fear of judgment or rejection, can fuel social anxiety.

5. Social factors: Social phobia can also be influenced by cultural or societal expectations, pressures to conform, or past negative experiences in social situations.

Determining the specific cause of social phobia in an individual usually involves a thorough evaluation by a mental health professional, such as a psychologist or psychiatrist. They may conduct interviews, assessments, and various diagnostic tools to make an accurate diagnosis and develop an appropriate treatment plan.