Why do I get a bumpy red rash on my forearms after working outside in the garden?
1. Introduction A bumpy red rash on the forearms after gardening is typically allergic or irritant contact dermatitis caused by exposure to plant sap, microscopic defensive hairs, or agricultural chemicals. The immune system reacts to these foreign substances by releasing histamine, creating localized inflammation, vasodilation, and raised fluid-filled papules along the areas where the skin … Read more