Hailey Bieber Opens Up About PMDD: What It Is and How It Differs From PMS

Many women feel moody, bloated or tired before their period. Most call it PMS and carry on. But for some, the weeks before a period bring something far heavier. In a recent interview with Women’s Wear Daily, Hailey Bieber said she struggled with premenstrual dysphoric disorder (PMDD) after her son’s birth, and that “there’s just not a lot of conversation or research around it.” So, what is PMDD, and how is it different from PMS? It is a severe form of PMS that can disrupt daily life. Here is what a gynaecologist and research say.

Does Hailey Bieber Have PMDD? What She Has Said

By her own account, yes. She told WWD that she struggled with PMDD after having her son.

Hailey Bieber Details Emotional Rollercoaster of PMDD Diagnosis After Son Jack Blues’ Birth: ‘Just a Really Intense and Special Journey’ https://t.co/spv9lYYPUE

— billboard (@billboard) November 6, 2026

Billboard reports she first spoke about the diagnosis on the SHE MD podcast in March, and said she was diagnosed about six months after giving birth. She also told the outlet that “conversation, for me personally, makes me feel less alone.”

What Is PMDD?  

Dr Lavanya Kiran, Director and Lead Consultant, Obstetrics, Gynaecology, KIMS Hospitals, Electronic City, Bengaluru says, “PMDD, or premenstrual dysphoric disorder, is a severe form of premenstrual syndrome (PMS). It causes intense emotional and physical symptoms in the one to two weeks before a period, strong enough to disrupt work, relationships and daily life. It affects roughly 3 to 8 per cent of women who menstruate.”

The American College of Obstetricians and Gynecologists (ACOG) gives a slightly lower estimate, at 2 to 5 per cent.

PMDD vs PMS: What Is the Difference?

Dr Kiran explains, “PMS is common and usually mild to moderate. PMDD is much less common and the mood symptoms are severe.”

What Are the Symptoms of PMDD?

Dr Kiran lists these signs:

• Severe irritability, anger or mood swings
• Feeling sad, hopeless, tearful or worthless
• Anxiety, tension or feeling on edge
• Trouble concentrating, and feeling overwhelmed
• Tiredness, sleep changes and food cravings
• Breast tenderness, bloating, headaches and joint or muscle pain
• Pulling away from friends or family

What Causes PMDD? Why Is the Brain So Sensitive?

“It is not ‘too much’ or ‘too little’ hormone,” says Dr Kiran. “Women with PMDD usually have normal hormone levels.”

ACOG’s 2023 guideline agrees. In its summary, hormone fluctuations are similar in people with and without premenstrual disorders. The difference is sensitivity. Two theories exist: falling oestrogen disturbs serotonin, the mood-steadying brain chemical, or progesterone’s by-product, allopregnanolone, acts oddly on the brain’s calming signal, GABA. Dr Kiran adds that genes, family history, past trauma and chronic stress raise the risk.

How Is PMDD Diagnosed?

“There is no blood test,” says Dr Kiran. Doctors ask you to track symptoms daily for at least two cycles. They also rule out thyroid problems, anaemia, depression and anxiety.

The American Family Physician summary of the ACOG guideline says the timing of symptoms is the most important element. It also notes that one study found three-fourths of women with premenstrual disorders had not been treated in the past five years.

A 2022 study in BMC Psychiatry surveyed 599 people with a prospectively confirmed PMDD diagnosis. It found high rates of suicidal thoughts at some point in life. Thirty-four per cent reported a past suicide attempt. According to a report on the study, patients waited 12 years and saw around six providers on average before an accurate diagnosis. It was an online survey, so it may not represent everyone. But it shows why PMDD must be taken seriously.

What Are the Treatment Options for PMDD?

Dr Kiran lists:

• Lifestyle: regular exercise, good sleep, less caffeine, alcohol and salt.
• Antidepressants (SSRIs): these often work within days when taken in the second half of the cycle, or all month.
• Certain birth control pills, especially some containing drospirenone.
• Therapy: cognitive behavioural therapy helps with coping.
• Supplements: calcium and vitamin B6 may help some women. Check with your doctor first.
• Hormone-suppressing medicines or surgery: rarely used, for severe cases.

ACOG’s guideline backs SSRIs, combined pills and CBT. The AFP summary notes that SSRIs can work in a few days.

When to See a Doctor About PMDD

Dr Kiran advises seeing a doctor if:

• Mood symptoms disrupt work, studies or relationships each month.
• Symptoms start one to two weeks before your period and settle after it.
• You have any thoughts of self-harm or suicide. “PMDD carries a higher risk of these thoughts, so seek help straight away, from a doctor, a trusted person or an emergency or mental health helpline.”

In India, Tele-MANAS offers free mental health support on 14416. 

ALSO READ- PMS Symptoms Changing Drastically in Your 30s? Gynaecologist Explains Why

Conclusion

Dr Kiran says, “PMDD is a real medical condition, not ‘just mood swings’. It happens because the brain is overly sensitive to normal hormone changes, and it can be treated.” A symptom diary and a visit to a gynaecologist are the best first steps.