People under stress experience mental and physical symptoms, such as irritability, anger, fatigue, muscle pain, digestive troubles, and difficulty sleeping. Anxiety, on the other hand, is defined by persistent, excessive worries that don't go away even in the absence of a stressor.
Anxiety is a person's specific reaction to stress; its origin is internal. Anxiety is typically characterized by a “persistent feeling of apprehension or dread” in situations that are not actually threatening. Unlike stress, anxiety persists even after a concern has passed.
Stress is the body's reaction to a threat, whereas anxiety is the body's reaction to the stress. People can manage their stress and anxiety with relaxation techniques, such as breathing exercises, physical activity, and talking about their worries.