Symptoms & care · 7 minute read
PMS and PMDD: timing is part of the diagnosis
How premenstrual symptoms differ from PMDD and why daily tracking across cycles can clarify the pattern.
Evidence-informed · Editorial review August 2026 · Links to trusted sources are available in the interactive app
Symptoms follow a cycle pattern
Premenstrual symptoms may include mood changes, irritability, food cravings, breast tenderness, bloating, fatigue, headache, or sleep changes. They typically occur after ovulation and improve after menstruation begins.
PMDD is more severe
Premenstrual dysphoric disorder involves severe mood symptoms and functional impairment. It is not simply “bad PMS.” A clinician considers timing, symptom type, other mental health conditions, and prospective daily records.
Safety comes first
Track symptoms every day rather than only on difficult days. Seek immediate help for thoughts of self-harm or suicide; in the United States, call or text 988 for the Suicide & Crisis Lifeline.