2024年7月31日 · Causes Acute bronchitis is usually caused by viruses, typically the same viruses that cause colds and flu (influenza). Many different viruses — all of which are very contagious — can cause acute bronchitis. Antibiotics don't kill viruses, so this type of medication isn't useful in most cases of bronchitis.

5 天之前 · Usually, a virus causes short-term bronchitis, and symptoms occur suddenly. Learn how to lower your risk of catching viruses that can cause bronchitis.

2024年7月31日 · During the first few days of illness, it can be difficult to distinguish the signs and symptoms of acute bronchitis from those of a common cold. During the physical exam, your doctor will use a stethoscope to listen closely to your lungs as you breathe. In some cases, your doctor may suggest the following tests:

2024年5月4日 · Bronchiolitis is a common lung infection in young children and infants. It causes swelling and irritation and a buildup of mucus in the small airways of the lung. These small airways are called bronchioles. Bronchiolitis is almost always caused by a virus. Bronchiolitis starts out with symptoms much like a common cold. But then it gets worse, causing coughing …

2023年10月4日 · Signs and symptoms of respiratory syncytial virus infection most commonly appear about four to six days after exposure to the virus. In adults and older children, RSV usually causes mild cold-like signs and symptoms.

2022年2月11日 · Whooping cough (pertussis) is a highly contagious respiratory tract infection. In many people, it's marked by a severe hacking cough followed by a high-pitched intake of breath that sounds like "whoop." Before the vaccine was developed, whooping cough was considered a childhood disease. Now whooping cough primarily affects children too young to have …

2023年2月8日 · Walking pneumonia is contagious. It's spread through airborne droplets from close contact, such as coughing, sneezing or speaking. People with lowered immunity may get more severely ill. You can be contagious long after you no longer have symptoms. Your symptoms may be mild enough that you don't see a health care provider.

2023年3月22日 · The symptoms of tuberculosis are similar to symptoms of many different illnesses. See your health care provider if you have symptoms that don't improve with a few days of rest. Get emergency care if you have: Chest pain. Sudden, severe headache. Confusion. Seizures. Difficulty breathing. Get immediate or urgent care if you: Cough up blood. Have …

2020年6月13日 · Children younger than age 2 with signs and symptoms People with an underlying health condition or weakened immune system People receiving chemotherapy or taking medication that suppresses the immune system For some older adults and people with heart failure or chronic lung problems, pneumonia can quickly become a life-threatening …

2022年12月3日 · Croup refers to an infection of the upper airway, which becomes narrow, making it harder to breathe. Croup also causes a cough that sounds like barking. The cough and other signs and symptoms of croup are the result of swelling and irritation around the voice box (larynx), windpipe (trachea) and bronchial tubes (bronchi). When a cough forces air through this …