Spring Bumps

So… every spring (starting around March and ending in about September sometimes) I get these bumps on the backs of my hands, on my forearms, and on the backs of my ears. This started about 4 years ago, give or take a few.

I just got them for this spring yesterday. They tend to be itchy at times. The issue is that I’ve talked to my mother about it and my doctor, and they both have no clue what it is. My doctor has told us that it might be a couple of things, but what causes it don’t match up and stuff like that.

I’m just wondering if any of you have even the slightest clue as to what this might be.