Does anyone feel like social situations are too intense and raw and this is what makes you feel so anxious? For example; making eye contact, being the center of attention, dealing with groups of people / or fast paced conversations. There's a theory of the autism spectrum that came out several years ago called intense world syndrome. It's applicable to people with social anxiety / avoidant personality, because these conditions are often comorbid with autism spectrum conditions (though this may be undiagnosed in many).
''It is proposed that the autistic person may perceive his surroundings not only as overwhelmingly intense, but also as aversive and highly stressful. The autistic person may well try to cope with the intense and aversive world by avoidance.''
''The lack of social interaction in autism may be because a subset of cues are overly intense, compulsively attended to, excessively processed and remembered with frightening clarity and intensity. Autistic people may be hyper-aware of selected fragments of the mind, which may be so intense that they avoid eye contact, withdraw from social interactions and stop communicating.''
''We suggest that enhanced fear and anxiety levels, mediated by a hyper-reactive and hyper-plastic amygdala, might underlie a core symptom of autism-impaired social behavior. A person daunted by anxiety and fears will normally not tend to interact with other people and will not dare to explore new situations and environments in the way a normal person does. ''
The researchers basically suggest that people on the autism spectrum perceive things more intensely due to an excessive amount of sensory processing in different parts of the brain, leading to hyper-perception, hyper-attention, hyper-memory, and difficulty shifting attention. Because of this they're at a greater risk of developing social anxiety and anxiety disorders in general compared to normals.