With miles of greenways and wooded paths woven throughout Ballantyne, from the Lower McAlpine Creek Greenway to the Four Mile Creek trails, it’s easy to enjoy time outdoors. But spending time near thick brush and shaded pathways also increases your chances of brushing up against poison ivy, oak, or sumac. These plants contain an oil called urushiol that can trigger a red, itchy, blistering rash on the skin, and while some reactions stay mild ...