MEMPHIS, Tenn. -- While it may look pretty to see nature wake up from its winter hibernation, many people know it can also bring major issues, such as allergies. In fact, the CDC reports that up to 60 million people a year battle seasonal allergies. When it comes to treating them, a doctor who spoke with WREG had a message and warning for people suffering. "Everyone is affected," Dr. Mark Castellaw said. Dr. Castellaw with the Baptist Medical Group said he's seeing patients with sinus and allergy issues, but imagines there are many more who don't see a doctor and treat themselves with over-the-counter medicine. He has a warning to those who decide to self-medicate. Long lines at DMV due to Real ID deadline "You need to be extremely careful about mixing over-the-counter antihistamines and decongestants with any prescription medicines," Dr. Castellaw said. He urges people to check with their healthcare provider before taking over-the-counter medicine to make sure it's safe to mix with any other medicine they're taking. "Like blood pressure medicine, heart medicine are the ones that are the biggest risk for you to be using over-the-counter medicines without getting your healthcare provider's permission," Dr. Castellaw said. He also said it's important to monitor your symptoms. "But the older folks, what you're concerned about the most is things can start off as an allergy episode but turn into a severe sinus infection," Dr. Castellaw said. "If your symptoms are prolonged, you start having colored discharge or start running a fever or anything like that, you need to contact your healthcare provider." National Civil Rights Museum at risk of losing federal funding Another thing to remember is that symptoms could be similar to COVID. So, Dr. Castellaw is urging people to get tested just in case. "Just today, I saw two patients that had typical allergy-like symptoms, but something just didn't seem right," he said. "Both of them had COVID. He said prevention is key. Here are some ways to limit your allergy exposure: Avoid being outside during peak pollen times. Wear a face covering if you're outside working in your yard. After you come indoors, change your clothes because they could be carrying pollen. Check your pets because they could be pollen carriers, too. The pollen count typically reaches its peak midday or early afternoon. ...read more read less