Medical symptoms refer to the manifestations or indications of a disease or condition, perceived and complained about by the patient. [1][2] Patients observe these symptoms and seek medical advice from healthcare professionals. WebMD Symptom Checker is designed with a body map to help you understand what your medical symptoms could mean, and provide you with the trusted information you need to help make informed. Learn about coronavirus symptoms, including early signs, common illness indicators, potential complications, diagnosis, and when to seek medical care. Easy and quick to use, simply enter all your symptoms to get a list of possible conditions along with medical guides for each explaining causes, symptoms, diagnosis and treatment options. Explore possible causes for your medical symptoms. Enter your symptoms into our Symptom Checker to see a list of matching conditions, plus advice on when to see your doctor. Find out about symptoms such as pain, stomach problems or skin symptoms, including causes, treatment and what to do. Find possible causes of symptoms in children and adults. See our Symptom Checker. While signs are objective and externally observable, symptoms are a person's reported subjective experiences. [1] A sign, for example, can be an elevated or lower than normal temperature or blood pressure, or an abnormal finding showing on medical imaging. People with COVID-19 have a wide range of symptoms ranging from mild symptoms to severe illness. Symptoms may appear 2-14 days after exposure to the virus. Symptoms may start as mild, and some people will progress to more severe symptoms. The following list does not include all possible symptoms.