PMS Symptom Calculator: PSST Score, PMDD Diagnosis and the Path to Treatment
Almost every woman knows premenstrual syndrome (PMS) — mild mood swings, breast tenderness and fatigue in the week before your period. But for 3 to 8 % of women, it crosses into a distinct disorder: premenstrual dysphoric disorder (PMDD). It is severe. It is real. And it is highly treatable.
The Premenstrual Symptoms Screening Tool (PSST) helps tell them apart. It mirrors the DSM-5 criteria for PMDD and gives you a clear starting point for the conversation with your gynecologist.
What is PMS, what is PMDD?
PMS and PMDD are both tied to the luteal phase of the cycle — the 1 to 2 weeks before your period. Symptoms resolve with the onset of bleeding. If symptoms persist into the first half of the cycle, something else is likely (depression, anxiety disorder, thyroid disease).
| Feature | PMS | PMDD |
|---|---|---|
| Prevalence | up to 75 % | 3–8 % |
| Main symptoms | Physical + mild psychological | Severe affective (anger, anxiety, depression) |
| Impairment | mild to moderate | severe, quality of life clearly reduced |
| DSM-5 | not a diagnosis | distinct psychiatric diagnosis |
The PSST — 14 symptoms, 5 life areas
The Premenstrual Symptoms Screening Tool was developed by Steiner et al. in 2003. It has two parts: 14 symptom items and 5 functional impairment items. Each is rated on a 4-point scale (0 = not at all, 3 = severe).
| Group | Items |
|---|---|
| Core (4) | Anger/irritability, anxiety, tearfulness, depressed mood |
| Additional (10) | Interest, concentration, fatigue, food cravings, sleep, overwhelm, physical symptoms |
| Impairment (5) | Work, coworkers, family, social life, home responsibilities |
The PSST criteria
PMDD (all three conditions)
- ≥ 1 core symptom severe (level 3)
- ≥ 4 additional symptoms moderate or severe (level ≥ 2)
- ≥ 1 impairment area severe (level 3)
Moderate to severe PMS
- ≥ 1 core symptom moderate or severe
- ≥ 4 additional symptoms moderate or severe
- ≥ 1 impairment area moderate or severe
Calculate your PSST score now
14 symptoms, 5 impairment areas, clear PMDD assessment per Steiner 2003. Free, instant, no sign-up.
Calculate PSST score →Treatment — what actually helps
Lifestyle for mild PMS
Regular exercise (3–5×/week, also in the luteal phase), sleep hygiene, stress reduction, less alcohol and caffeine. Calcium 1,000–1,200 mg/day, vitamin B6 50–100 mg, magnesium 200–400 mg — evidence-based, mild effect.
Chasteberry (Vitex agnus-castus)
Effective in multiple RCTs for moderate PMS. Mild effect profile, side effects rare. First choice for those preferring herbal options.
Combined pill with drospirenone
24/4 regimen (e.g. Yaz, Yasmin). FDA-approved for PMDD, with clear evidence against both affective and physical symptoms. Classic 21/7 pills are often less effective.
SSRIs for PMDD
Fluoxetine, sertraline or paroxetine are first-line for PMDD. Effective also as luteal-phase-only dosing — effect within the first week. Treatment of choice when mood symptoms dominate.
Cognitive behavioral therapy (CBT)
Effective for moderate-to-severe PMS and PMDD. Works especially well for irritability, depressed mood and coping strategies.
When to see a gynecologist?
At the latest with moderate-to-severe PMS or a PMDD suspicion. Bring a cycle diary covering at least 2 cycles to your appointment (daily notes on mood, sleep, symptoms). That is the foundation of any DSM-5 PMDD diagnosis.
If your cycle is markedly irregular or you notice signs of hyperandrogenism, also check the PCOS symptom checker. To pin down the start of your luteal phase, use the ovulation calculator. For an overall understanding of your cycle, the period calculator guide maps every phase, hormonal pattern and interpretation tip.
Bottom line
PMS is common — PMDD is real, severe and often goes unrecognized for years. The PSST separates them reliably and gives you a clear baseline for your next appointment. Start with the PMS symptom calculator, keep a cycle diary and talk to your gynecologist — effective treatments exist for every severity level.