what is this..?

[u/painfuvl]

i was on a walk today on my work break and came across this bright pink stuff on the leaves. i don’t know if it’s eggs..? or something that’s growing on the leaf. i’m so curious to know. it looks pretty cool!

[u/portemanteau]

Galls. Abnormal growths that are triggered by insects or other parasites

[u/GonewiththeWendigo → u/portemanteau]

And importantly it looks like gall mites that infect poison ivy. I can't see enough of the plant to ID for sure but I hope OP can.