The major cause of anxiety is stress. It usually comes from problems people experience at work, or even the problems that people deal with at home. There might be positive effects of anxiety but, most of the time, it turns into a serious disorder if you let it linger and continue for a long time. A few of the documented long-term negative effects of anxiety are:

Higher risk of stroke
Whenever you feel anxious, there’s actually an activity in your brain that releases ‘flight or fight’ hormones. If you constantly become anxious, this activity happens very often, increasing your risks of having a heart attack. In fact, there is a research that men aging 30-40 years old who experience psychological distress are 3 times more likely to have a fatal stroke.

Rapid deterioration of memory
The damage that is caused by anxiety to your hippocampus cells affects your memory and learning abilities. This results to memory decline in a much younger age.

Insomnia is a pretty common effect to having anxiety disorder. It is actually one of the first indicators of anxiety disorder.

Abrupt change in personality due to emotional distraction.
Anxiety can distract you even from things that are actually important to you. When you are anxious, it impairs your ability to concentrate which leads to low performance in things you do and even screwing up your relationships with people. Anxiety makes you cranky all the time and it results to major mood swings.

These are natural ways that can help you reduce anxiety:
A daily dose of fresh air and a little exposure to sunshine
Body massages that help you relieve the tension in your muscles
Aroma therapy which helps you relax your mind
Exercise routines like yoga
Healthy diet that makes your hormones and transmitters become balance