Plegridy bruise

So i started on Plegridy last week, took first dose everthing ok didnt feel too ill after, however i have been left with a large red bruise/mark on site where i injected, its not sore, just there.
Ive got another week before i take next dose but wondering if its normal to get mark like that and how long it should last.

I would have a chat with my MS Nurse

Yes, I am on plegridy. It’s normal. I get these marks every single time. Try to apply witch hazel gel. It helps. Avoid having a hot shower or bath for 24 hours after the injection, as it makes it worse. Also, make sure that you have left the pen outside the fridge for at least an hour before you inject. I have been doing plegridy in the past 2 months or so. It gets better. Lately, the red areas get smaller and smaller. It looks like my body is getting used to it.