My foreskin is red

so i had unprotected sex and after my foreskin got red and it feels like a burn and I’ve got some red bumps on my shaft, does anyone know what it could be?

only feel it burn when i pull my foreskin back

When did you have sex?
If you did vaginal most likely a yeast / fungal infection - if you did anal most likely a bacterial infection, if you did both could be either, or potentially even both …