Runny nose Causes - Mayo Clinic
2023年4月7日 · Anything that irritates the inside of the nose can cause a runny nose. Infections — such as colds, flu or sinusitis — and allergies often cause runny and stuffy noses. Some people have noses that run all the time without a known reason. This is called nonallergic rhinitis or vasomotor rhinitis.
Runny nose - Mayo Clinic
2023年4月7日 · A runny nose is having fluid run out of the nose. The fluid can range from thin and clear to thick and yellow-green. The fluid might drip or run out of the nose, down the back of the throat, or both. If it runs down the back of the throat, it's called postnasal drip.
Common cold - Symptoms and causes - Mayo Clinic
2023年5月24日 · The common cold is an illness affecting your nose and throat. Most often, it's harmless, but it might not feel that way. Germs called viruses cause a common cold. Often, adults may have two or three colds each year. Infants and young children may have colds more often.
Nonallergic rhinitis - Symptoms & causes - Mayo Clinic
2023年3月14日 · Overview. Nonallergic rhinitis involves sneezing or a stuffy, drippy nose. It can be a long-term problem, and it has no clear cause. The symptoms are like those of hay fever, also called allergic rhinitis. But nonallergic rhinitis isn't caused by allergies.
Acute sinusitis - Symptoms and causes - Mayo Clinic
2023年8月29日 · Thick, yellow or greenish mucus from the nose, known as a runny nose, or down the back of the throat, known as postnasal drip. Blocked or stuffy nose, known as congestion. This makes it hard to breathe through the nose.
Respiratory syncytial virus (RSV) - Symptoms & causes - Mayo Clinic
2023年10月4日 · In children, COVID-19 often results in mild symptoms such as fever, runny nose and cough. For adults with COVID-19, symptoms may be more severe and may include trouble breathing. Having RSV may lower immunity and increase the …
COVID-19, cold, allergies and the flu: What are the differences?
2023年11月3日 · Sometimes (especially with a stuffy nose) COVID-19 symptoms usually start 2 to 14 days after exposure to SARS-CoV-2. But symptoms of a common cold usually appear 1 to 3 days after exposure to a cold-causing virus. There's no cure for the common cold.
Coronavirus disease 2019 (COVID-19) - Symptoms and causes
Cold-like symptoms such as congestion, runny nose or sore throat. People may only have a few symptoms or none. People who have no symptoms but test positive for COVID-19 are called asymptomatic.
Chronic cough - Symptoms and causes - Mayo Clinic
2019年7月9日 · Symptoms. A chronic cough can occur with other signs and symptoms, which may include: A runny or stuffy nose. A feeling of liquid running down the back of your throat (postnasal drip) Frequent throat clearing and sore throat. Hoarseness. Wheezing and shortness of breath. Heartburn or a sour taste in your mouth.
Allergies - Symptoms and causes - Mayo Clinic
2024年8月24日 · Itching of the skin, nose, eyes or roof of the mouth. Runny, stuffy nose. Tiredness, also called fatigue. Watery, red or swollen eyes, also called allergic conjunctivitis. A food allergy can cause: Tingling in the mouth. Swelling of the lips, tongue, face or throat. Itchy welts called hives. Stuffy nose, sneezing or teary eyes that itch.