Persistent and unrelenting stress is called anxiety. Anxiety is an emotion often accompanied by various physical symptoms.
These can include twitching or trembling, muscle tension, headaches, sweating, dry mouth, or difficulty swallowing. Some people also report dizziness, a rapid or irregular heart rate, increased rate of respiration, diarrhea, or frequent need to urinate when they are anxious. Fatigue, irritable mood, sleeping difficulties, decreased concentration, sexual problems, and nightmares are also common.
