As one that's had anxiety for 10+ years i can say it's not something that's often entirely defeated. Most people, once they have it, tend to have it reoccur the rest of their life. Though the degree of it can be lessened and learning how to deal with it makes it easier.
Many people simply have personalities that gear towards being anxious. Others have some kind of mental illness that causes it or is common with it.
Overcoming anxiety takes a long time and and a lot of work. The severity and the impact it has on your life could determine how important getting professional help is. If it's not too strong then you may be able to minimize it further without professional help.
One suspected reason for an increase in anxiety is people today tend to breath shallower breaths. If you feel a bit of anxiety coming on try checking your breathing and taking deeper breaths. This is a big part of the relaxation smokers feel. How smokers tend to want to smoke during stressful situations has less to do with cigarettes and more to do with the deep breathing the use to smoke.
Avoiding caffeine is another help. And, if possible, sugar. This is especially important when you feel anxiety coming on, as these things can actually feed the anxiety attack.
If your anxiety isn't too severe try natural supplements. Gaba is a popular one, and one that i use when i feel anxiety getting too hard for me to control it.
If it gets out of hand a professional may then be needed. Medication should always be a last resort.
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