This symptom may result from a wide range of life stresses.
Irritability usually is a short-term symptom.
When it is on-going, or severe, it may be caused by something more serious. Causes include digestive tract disease, neurologic problems, substance abuse, or mental illness. Take steps to find the cause of irritability if it is a constant problem. Seek medical evaluation when it affects normal daily living. Signs include not sleeping or eating right, overuse of drugs or alcohol, or inability to do daily activities.