Some kind of plant that causes itching?

My mom was walking in our backyard, trying to clear some of the weeds and other things in our forests. (We are trying to delete / all / to there.) And she began to receive some sort of looking for things like rash on his arms. Came as blisters, too. She says it was not poison ivy … And I know that there are two. Poison oak and poison sumac. It is none of these, and even investigated some called nettles. Does anyone know of any other similar plants to those I described that cause itching, rashes and other skin irritations?

Blisters sound like poison oak or sumac or ivy. Immediate medical attention is necessary if the condition is extensive or near eyes and mouth. I never heard of nettle causing blisters. The best way to treat the nettle is a skin scraping with the edge of a credit card. No hot water …. as it opens the pores for penetration deep.

Scabies