When a person's feelings are affected by stress, they become very anxious, irritable, and even scared. If you let your feeling and emotions be ruled by the stress you are under, you may quickly lose friends; or worse, lose yourself. You must learn to control your feelings when under extreme amounts of stress. A person's thoughts are also seriously affected by stress. When a person's thoughts are affected, they begin to have low self-esteem, the inability to concentrate, they constantly have the fear of failure, and they are often preoccupied and forgetful. Behavior is another factor which is influenced by stress. When someone's behavior is affected by stress, they may have difficulty speaking, they can become very impulsive, and they can either become very nervous (apparent by the high pitched voice) or very sad and cry for no apparent reason