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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.

Bruising at injection site

6 replies

LakeFlyPie · 26/05/2026 10:05

I've been on MJ for >10months and never noticed bruising before. Always pinch tummy and inject there. Last 2 jabs have resulted in a bruise, have currently got 2 fading but noticeable bruise marks. Not aware I've done anything differently. For the 1st time in years I'm considering a bikini for my summer holiday but don't want to have bruise marks on show too. Any tips for bruise free jab technique or any idea what is different to cause recent issues?

OP posts:
MoneyJo · 26/05/2026 10:08

I think people bruise easier in warmer weather. Could it be that?

WeAllHaveWings · 26/05/2026 10:14

MoneyJo · 26/05/2026 10:08

I think people bruise easier in warmer weather. Could it be that?

This also might be a possibility if pen is being used directly from fridge.

Gardengargoyle · 28/05/2026 16:36

I'm diabetic and have been injecting for decades. Originally counting carbs and insulin units before every meal, more recently a single mounjaro injection once a week. That adds up to a helluva lot of jabs over the years.

With these mosquito fine needles it is normal to feel nothing as the needle goes in, and to have no reaction when it is pulled out again. However, every now and again the needle will pierce a capillary as it goes in, and the escaped blood will leave a bruise. They are usually completely painless and I often don't notice until I catch sight of the area when getting undressed in the evening.

Every 100 or so injections the needle has the bad luck to poke one of the pain receptors in the skin that are designed to react to piercing pain, and it feels like you've been jabbed with a pin. The sensation is acute and highly disconcerting, but lasts only a fraction of a second.

If you really hate that feeling you can give the area a quick slap immediately prior to pushing the needle into the skin. That triggers the pain receptors to release their signals, and if you follow up quickly with the jab they won't have had time to reload.

LakeFlyPie · 28/05/2026 20:04

Thanks for the comments and advice. No pain, just noticed the last 2 jabs have caused bruising after months with no mark. Wonder if I need to pay more attention to my 'pinch up' now there's not so much to pinch!

OP posts:
Carol243 · Yesterday 21:30

I bruise more easily now than I used to anyway, so I’ve had the odd tummy bruise from injections too. I started rotating spots a bit more and trying not to press too hard afterwards which seemed to help. Mine usually faded after a week or so.

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