Why Am I So Angry Before My Period?

Many women in their late 30s and 40s notice they become unusually irritable, impatient, or angry before their period and wonder what has changed. This evidence-based guide explores the science behind perimenopause mood changes, explaining how fluctuating estrogen and progesterone influence the brain, why symptoms often worsen before menstruation, and the role of sleep, stress, nutrition, and lifestyle in emotional well-being. Learn the difference between perimenopause, PMS, PMDD, anxiety, and depression, and discover evidence-based strategies that may help.