Help! Sudden Itchiness and Bumps on One Arm😕

Hi everyone, I'm feeling a bit lost and concerned right now. Out of nowhere, one side of my arms has become incredibly itchy, and when I scratched it, I noticed it has developed many little bumps. This has never been a problem before, and it's quite unsettling. The strange thing is, it wasn't bothering me earlier, but after I hung the laundry, it suddenly turned red, itchy, and the bumps started forming. I tried applying moisturizer, which provided some relief, but I'm still unsure about what could be causing this sudden reaction. I did some household chores like washing the dishes, but it didn't feel like this initially, just a mild itchiness. Now, it's escalated into something more uncomfortable with a burning sensation. Has anyone experienced something similar or have any idea what might be happening? I haven't encountered anything like this before with bumps and a burning sensation, so any insight would be greatly appreciated. Thanks in advance for any help or advice you can provide!