Shoulder Pain During Your Period
Shoulder pain that comes back with your period can be a sign of endometriosis on the diaphragm. It's often felt at the tip of the right shoulder, though the left shoulder or both can hurt. When it happens tells you more than where it hurts.
- How common
- Rare
- When
- Before and during your period
- Where
- Shoulder tip, often the right
Medically reviewed by Dr. Steven Vasilev, MD
Board-Certified Gynecologic Oncologist & Integrative Medicine Diplomate, Advanced Robotic Endometriosis Excision Surgeon, Director of Lotus Endometriosis Institute · Updated Oct 2026
Where you feel it
Front view of the upper body. The right side of the diaphragm is highlighted, with a dotted line to the right shoulder, where the pain can be felt.
- Diaphragmusually the right side
- Right shoulderpain often shows here
- Lungsrarely involved
When it flares
It can start a day or two before bleeding and fades as your period ends; some people feel it around ovulation too. Shoulder pain that doesn't follow your cycle still deserves a check.
Does this sound like you?
Tap any that fit. We'll turn them into a note you can bring to your visit.
None of these? If your shoulder pain worries you, it's still worth a conversation. Speak with us
When to get help
Shoulder pain that follows your cycle often isn't coming from the shoulder. If yours comes back with your period, see an endometriosis specialist rather than trying another round of shoulder treatment.
Keep track
For two or three cycles, note the cycle day, which shoulder hurts, how bad it is and what makes it worse. It's the most useful thing to bring to your first visit.
Speak with Us
Book a visit if it:
- Comes back with your period or ovulation
- Comes with pelvic pain or painful periods
- Hasn't eased with usual shoulder treatment
Your first visit
We go through your history and your notes, then map out next steps together, whether that's tests, imaging or treatment.
When it needs a specialist: Diaphragm endometriosis surgery
What it feels like
How patients often describe it
- It's a deep ache at the tip of my shoulder.
- It stabs when I breathe in deeply.
- It spreads to my neck or shoulder blade.
- Massage and rest barely help.
Many people describe a deep ache, pressure or a stabbing pain near the top of the shoulder, under the collarbone or along the shoulder blade, sometimes reaching the neck or upper arm. When the diaphragm is involved, it tends to start a day or two before bleeding, peak in the first days of your period and ease afterward, often with pain under the right ribs or in the chest. Some people feel it around ovulation too. Over time it can come more often and follow your cycle less clearly.
Why it happens
Endometriosis on the diaphragm
Endometriosis can grow on the diaphragm, the dome-shaped muscle under your lungs, most often on the right side. These lesions respond to your hormones, so they swell and become inflamed around your period. The diaphragm shares nerves with the neck and shoulder, so your brain feels that irritation in the shoulder. This is referred pain: the shoulder joint itself is often normal. It's most often felt on the right, but the left shoulder or both can hurt.
Less often, endometriosis inside the chest (thoracic endometriosis) can collapse a lung around a period, causing sudden sharp chest pain and shortness of breath, sometimes with shoulder pain, that need emergency care.
Adenomyosis and other contributors
Adenomyosis rarely causes shoulder pain by itself, since its symptoms center on the uterus. But it often occurs alongside endometriosis, so shoulder pain that follows your cycle is a reason to look for endometriosis higher up.
Inflammation can make nerves more sensitive, and guarding, tense neck muscles and bloating that pushes upward can all add to the ache.
Learn moreEndometriosisAdenomyosis
“If your shoulder hurts every period, tell your doctor, even if nobody asks. That pattern points us to the diaphragm, and a surgeon has to look there on purpose to find it.”
Why it's often missed
Shoulder pain is common, so it's easily put down to a rotator cuff injury, a pinched nerve, gallbladder trouble, reflux or sleeping wrong. The clue that points to endometriosis is timing: pain that comes back with every period, often alongside pelvic pain, bloating or tiredness.
Tests often miss it too. Even MRI can miss small diaphragm lesions, and many are only found when a surgeon deliberately looks at the diaphragm during laparoscopy.
How it's diagnosed
Track two or three cycles
Note the cycle day, which shoulder hurts and what makes it worse. Pain that lines up with your period is one of the biggest clues a specialist can get.
Rule out other causes
Heart, lung, gallbladder and shoulder-joint problems are checked first.
Imaging where it helps
MRI can show some diaphragm lesions and helps plan surgery, but a normal scan doesn't rule them out.
See an endometriosis specialist
An endometriosis-focused evaluation looks beyond the pelvis and can confirm and treat diaphragm disease with laparoscopy. It starts with a detailed conversation about your history, so bring your notes.
Treatment options
Treatment depends on what's driving your pain, and often combines several approaches.
- Medical
Hormonal therapy
Quiets the cycle so diaphragm lesions flare less, though it doesn't remove them.
Hormonal Therapy - Medical
Pain relief
Anti-inflammatories and, when needed, nerve-pain medicines that calm sensitized nerves.
Pain Management - Surgical
Excision surgery
Removes diaphragm lesions at the root when pain persists or medication isn't enough. Diaphragm surgery takes specific experience, and sometimes a chest or general surgeon joins the team.
Surgery overview - Support
Supportive care
Heat, pacing, gentle pain-free breathing and integrative care, such as acupuncture and stress support.
Integrative Medicine
Shoulder pain around your period?
We look for endometriosis where it's often missed, including the diaphragm.
Schedule a ConsultationPrefer to talk it through? Call or text us.
Questions people ask
Why do I get shoulder pain during my period?
Shoulder pain around your period can come from irritation caused by endometriosis on or near the diaphragm, the muscle between your abdomen and chest. This referred pain can affect the right shoulder or arm and may worsen with deep breathing or coughing.
Can endometriosis cause shoulder pain during periods?
Yes, endometriosis can cause shoulder pain during your period, most commonly when it affects the diaphragm, especially on the right side. Shoulder pain can have many causes, but a clear pattern linked to your menstrual cycle is an important clue.
Is shoulder pain more common with right-sided diaphragmatic endometriosis?
Often, yes: people with diaphragmatic endometriosis frequently report right-sided shoulder pain. Left-sided or bilateral pain can also happen, so the side alone cannot confirm or rule out diaphragmatic involvement. The pattern, especially flares with your menstrual cycle, matters.
Can adenomyosis cause shoulder pain?
Adenomyosis alone is less likely to fully explain shoulder pain, since it usually causes symptoms centered in the uterus. Shoulder pain that flares around your period can be a clue to overlapping endometriosis, including near the diaphragm.
What treatments help with cyclical shoulder pain?
Hormonal suppression may lessen cyclical shoulder pain for some patients, and anti-inflammatory medicines may help. If diaphragmatic endometriosis is strongly suspected or confirmed and symptoms significantly affect your life, excision surgery with an experienced team can offer durable relief.
How is diaphragmatic endometriosis diagnosed?
The most reliable way to diagnose diaphragmatic endometriosis is minimally invasive surgery to inspect the diaphragm and remove suspicious lesions for pathology when appropriate. Imaging can help guide evaluation, but a normal scan does not rule it out.
Often happens with
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Sources & medical review
Reviewed by Dr. Steven Vasilev, MD, Board-Certified Gynecologic Oncologist & Integrative Medicine Diplomate, Advanced Robotic Endometriosis Excision Surgeon, Director of Lotus Endometriosis Institute. Last reviewed Oct 2026; next review Oct 2027.
- Piccus R, Mann C, Sutcliffe RP. Diagnosis and treatment of diaphragmatic endometriosis: results of an international patient survey. Eur J Obstet Gynecol Reprod Biol. 2021;260:48–51.
- Naem A, Roman H, Martin DC, Krentel H. A bird-eye view of diaphragmatic endometriosis: current practices and future perspectives. Front Med (Lausanne). 2024;11:1505399.
- Ceccaroni M, Roviglione G, Giampaolino P, et al. Laparoscopic surgical treatment of diaphragmatic endometriosis: a 7-year single-institution retrospective review. Surg Endosc. 2013;27(2):625–632.