Warm weather in Modesto means more time outside enjoying neighborhood parks, backyard barbecues, hiking nearby trails, youth sports, and weekends spent exploring the Central Valley. But more time outdoors can also mean more exposure to summer skin irritations that leave you uncomfortable and wondering what exactly caused the rash. Two of the most common warm-weather skin concerns people experience are heat rash and poison ivy. While both can cause itching and irritation, they develop for ...