Petites choses rouges en forme d'éclats ou d'épines dans la peau

I have these strange brown/red things stuck in my arm. Does anyone know what these could be? I was handling salmon earlier so it could potentially be fibres from that, or some kind of plant, but any ideas are appreciated!

On dirait une sorte de tache ?

I have the same thing on my finger currently! Did it hurt too? Have you gotten it figured out?