Patients can use the feature to learn about symptoms and in certain cases read recommendations about self-care, Mayo said.Mayo Clinic and EHR vendor Epic Systems have added Mayos symptom checker functionality into Epics MyChart portal. The new arrangement means that patients can use the symptom checker, previously available on Mayos website, to assess common ailments, such as dizziness, swelling, anxiety, migraine, cold or flu. Mayos symptom checker is driven by algorithms based on data entered by users. It runs 36 algorithms that cover more than 300 common symptoms.