I understand how worrying this must be — seeing your child vomit every month is very stressful.
From what you describe, this sounds like severe menstrual-related vomiting (primary dysmenorrhea / hormonal trigger) — common in early teenage years when cycles are still settling.
The pattern (starting soon after periods begin, then resolving completely) strongly points to a hormonal prostaglandin response, not something dangerous — especially since she’s totally normal between cycles.
Next Steps
• Get basic tests done: CBC,
ferritin,
thyroid, ultrasound pelvis
• She may need anti-vomiting medicine + pain control started BEFORE periods begin
• If severe, short-term hormonal regulation may be advised
• Keep her hydrated during episodes (ORS, small sips)
Health Tips
This is treatable — she doesn’t have to suffer every month. But because vomiting is intense and lasting days, don’t ignore it. Early treatment prevents worsening and school disruption.