Some research suggests that people who have panic disorder might be very sensitive to sensory experiences (such as sunlight, smells and changes in the weather), but there's not enough evidence yet to say for sure. Also it's not clear whether having a high level of sensitivity to these sorts of things is something that might cause you to develop panic disorder, or whether it may be an effect of having it.
Panic attacks (or anxiety attacks - the terms are interchangeable) are intense episodes of fear which are so powerful that they trick you into fearing that you are dying, going crazy, about to faint, or losing control of yourself in some vital way. The symptoms of a panic attack feel so powerful and threatening that they convince you that you're in terrible danger.
There are dozens of drugs that can be prescribed to treat anxiety. Since each person responds to medication differently, there's no one drug that works perfectly for everyone. You may have to work a little with a psychiatrist to find the right medication, or the right combination of medicines, that’s most beneficial to you. The drugs that are used to treat anxiety over a long period of time are antidepressants, which affect serotonin, norepinephrine, and other neurotransmitters in the brain.
Social anxiety disorder (previously called social phobia): People with social anxiety disorder have a general intense fear of, or anxiety toward, social or performance situations. They worry that actions or behaviors associated with their anxiety will be negatively evaluated by others, leading them to feel embarrassed. This worry often causes people with social anxiety to avoid social situations. Social anxiety disorder can manifest in a range of situations, such as within the workplace or the school environment.