Bumps and welts

gemini • 3 👶🏽👶🏽👶🏽 💏💎💍🙏🏽

I keep waking up with these bumps on my arm...it’s only on my arms and often will just be on one arm instead of both. It’s itchy and they go away after a while later in the day...even if they go away I’m tired of them it’s been like this a couple weeks...I have no idea what it is because if it was an allergic reaction shouldn’t it be everywhere? I don’t know going crazy help! Anyone else ?