It is hard to say whether you have an anxiety disorder, but it is clear that the problem is causing you a great deal of stress. Blushing is a normal involuntary reaction that results from dilation of the superficial blood vessels in the face. Researchers have been unable to discover a clear physical reason why some people experience frequent blushing while others do not. Fair skinned people seem to be more aware of their blushing because it is more noticeable.
Being self-conscious of your blushing is probably making it worse. Being "always nervous" increases the activity of the autonomic nervous system, which leads to blushing.
TeenHealthFX wants you to know that seeing a therapist is not something that you should be afraid of. Therapists are there to help you and are trained to deal with problems such as yours. Learning relaxation techniques will help you decrease the amount of nervousness you continually experience. The therapist can also help you confront emotional situations that trigger blushing and help you realistically assess how others perceive you. Once you are able to overcome the anxiety that triggers blushing, its frequency and intensity will decrease and you will be able to function in settings that were previously threatening. If you continue to struggle, your therapist could refer you to a medical doctor who could assess whether medication would be beneficial.
If you need a therapist and live in northern New Jersey you can call the Access Center at Atlantic Behavioral Health at 888.247.1400 for an appointment.
Hang in there things can and will get better with the right help.