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Weight loss injections/treatments

Discuss weight-loss injections and treatments, including personal experiences. Mumsnet hasn't checked the qualifications of anyone posting here. You may wish to speak to a medical professional before starting any treatments.

Spotting and breast pain after jab

3 replies

User99999999 · 12/11/2025 07:14

I’ve been using Mounjaro since May and have lost nearly 3 stone! Hurrah!!!

I’ve noticed that in the 2/3 days following an injection, that I get a bit of spotting and some breast tenderness.

Anyone else get this?

I am 45 and had the merina coil fitted earlier this year to help with symptoms of perimenopause, particularly very heavy bleeding. It’s done the trick, but my periods are now very light and sporadic instead.

So it’s difficult to be certain if the mounjaro is causing this spotting or if i would have had sporadic breakthrough bleeding anyway and the timing is pure coincidence!?

OP posts:
User99999999 · 12/11/2025 18:47

Cheeky bump for evening traffic

OP posts:
Flowers8989 · 12/11/2025 18:48

I have slightly irregular periods on MJ I've bled twice this month. I think weight loss releases estrogen which can cause bleeding?

gallivantsaregood · 12/11/2025 20:47

No spotting. I'm 53 and on the mini pill to control my endometriosis. But geez my boobs, especially my nipples have been sore recently.

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