Irritability

What is it?

Irritability is low frustration tolerance that causes disproportionate emotional responses to everyday stressors. While often dismissed as a character trait, persistent irritability is a symptom with medical causes. It is a core feature of depression (particularly in men and adolescents), anxiety, ADHD, premenstrual syndrome (PMS/PMDD), sleep deprivation, hypoglycemia, and thyroid disease. Irritability can seriously strain relationships and quality of life and deserves clinical attention when persistent or worsening.

Common causes

When to see a doctor

• 1Irritability that is affecting relationships, work, or daily functioning
• 2New or worsening irritability accompanied by sadness, hopelessness, or sleep changes
• 3Irritability with racing thoughts, reduced need for sleep, and elevated mood (mania)
• 4Irritability with hot flashes, weight changes, and menstrual irregularity
• 5In children: persistent irritability with frequent meltdowns, aggression, or school problems

What you can do

• ✓Identify triggers and patterns — a mood journal helps link irritability to sleep, diet, or hormonal cycles
• ✓Prioritize consistent sleep — even one night of poor sleep significantly reduces frustration tolerance
• ✓Reduce caffeine and alcohol — both disrupt emotional regulation
• ✓Regular vigorous exercise is one of the most effective non-medication interventions for irritability
• ✓Practice mindfulness or STOP technique (Stop, Take a breath, Observe, Proceed) in the moment

Conditions that cause this symptom

Medications that may help

Treatment depends on the underlying cause. Always consult your provider before starting any medication.

Frequently asked questions