Conditions list medically reviewed by George Krucik, MD, MBA
A cold is a common viral infection of the upper respiratory tract–namely, your nose and throat. A runny or stuffy nose, sneezing, coughing, and sore throat are common…
Allergic rhinitis, or hay fever, is your body's response to specific allergens. It causes uncomfortable symptoms like sneezing and itchy eyes.
Common colds and influenza are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Shared…
A sinus infection, or sinusitis, is a common condition that affects 30 million people in the United States each year, according to the National Institute of Allergy and…
Swine flu, or H1N1, is highly contagious and can spread quickly from person to person. A simple sneeze may cause thousands of germs to spread through the air.
Learn about what causes allergies, the different types of allergies, and how they're treated.
RSV is virus that causes symptoms similar to those of a cold and occurs most frequently in children. Learn about causes and treatment.
Allergic asthma is asthma caused by an allergic reaction. You may have allergic asthma if you have trouble breathing during allergy season.
Learn about sarcoidosis and its causes, symptoms, diagnosis, treatment, and potential complications.
Fifth disease is common in children. It causes a red rash on the arms, legs, and cheeks, and a virus called parvovirus B19 causes it.
Agammaglobulinemia is an inherited immune system disorder in which the body is unable to produce antibodies.
Encephalitis is inflammation of the brain tissue. It's most often caused by viral infections. In some cases, bacterial infections can also cause encephalitis.
Leishmaniasis is a parasitic disease caused by the Leishmania parasite found in sand flies.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.