Sensitivity to sunlight

Hi everyone, Does anyone else suffer sensitivity to sunlight? I’ve always been fine sitting in the sunshine for a good hour before I need to think about cream etc but twice recently I’ve sat in the garden for 15 mins maximum. My skin has gone bright pink and then I’ve spent the next day and night itching my arms like mad. It looks like I have prickly heat. I’m on Avonex and this is the only thing I can think of that’s changed. Apart from now having MS but it isn’t normal for me. I’ve rang my nurse to ask her but waiting on a call back. I just wondered if anyone else had experienced anything similar?

I know some medications that you have to be careful about the sun, I take oxytetracycline and I burn very easily with this medication, I use fifty plus sun lotion. Maybe they changed the recipe.