The hallmark symptom of bronchitis is a persistent cough that typically lasts two to three weeks, often producing mucus. But bronchitis involves more than just coughing. Depending on whether you’re dealing with the acute or chronic form, the full picture of symptoms can range from mild chest tightness to ongoing breathing difficulty.
The Core Symptoms of Acute Bronchitis
Acute bronchitis is the most common type, usually triggered by the same viruses that cause colds and the flu. It often starts feeling exactly like a cold, with a runny nose, sore throat, and general fatigue. Within a few days, the cough takes center stage and becomes the dominant symptom.
That cough may be dry at first, then shift to producing mucus (sputum). The mucus is typically clear or white early on. Along with the cough, you may notice:
- Chest soreness or tightness from repeated coughing
- Low-grade fever and chills, usually mild
- Body aches and fatigue, similar to what you’d feel with a cold
- Wheezing or rattling in the chest, especially when breathing deeply
Most of these symptoms fade within a week or so, but the cough is the stubborn one. A systematic review found that the median duration of bronchitis-related cough is about 18 days. So if you’re still coughing two or even three weeks after getting sick, that’s within the normal range for bronchitis and doesn’t necessarily mean something worse is going on.
What Your Mucus Color Means
Many people worry when their mucus turns yellow or green, assuming it signals something serious. Mucus color can offer some clues: clear or white mucus is more common with viral bronchitis, while yellow or green mucus may suggest a bacterial infection has developed on top of the initial viral one. That said, color alone isn’t definitive. Your immune system’s response to any infection can change mucus color, so green phlegm doesn’t automatically mean you need antibiotics.
How Chronic Bronchitis Differs
Chronic bronchitis is a different condition with overlapping symptoms but a much longer timeline. The clinical definition is specific: a cough that produces mucus for at least three months in a year, two years in a row, along with reduced airflow in the lungs. It falls under the broader category of chronic obstructive pulmonary disease (COPD) and is most common in people who smoke or have long-term exposure to air pollutants.
The symptoms of chronic bronchitis include a daily productive cough, shortness of breath that worsens with physical activity, frequent throat clearing, and periodic flare-ups where symptoms suddenly get worse. Unlike acute bronchitis, which resolves on its own, chronic bronchitis is a long-term condition that progressively affects breathing capacity. People with chronic bronchitis also tend to pick up respiratory infections more easily, which can trigger acute episodes on top of their baseline symptoms.
Bronchitis Symptoms in Children
Children develop bronchitis too, though in very young kids (especially under two), the closely related condition bronchiolitis is more common. It starts looking like a regular cold with a runny nose, mild cough, and sometimes a slight fever. Over the next few days, the cough worsens and a high-pitched whistling sound (wheezing) often develops, particularly when the child breathes out. Some children visibly work harder to breathe, with faster breathing rates or noticeable effort between the ribs.
In infants, watch for signs of dehydration from not feeding well, since rapid or labored breathing can make it hard for them to eat or drink. Babies born prematurely or those under two months old are at higher risk for complications, including pauses in breathing.
Bronchitis vs. Pneumonia Symptoms
Since bronchitis and pneumonia can start similarly, knowing the differences matters. Bronchitis inflames the airways (bronchial tubes), while pneumonia infects the lungs themselves. The practical difference shows up in symptom severity.
Bronchitis typically produces a mild fever at most. Pneumonia can drive fevers as high as 105°F (40°C). Breathing difficulty with bronchitis is usually mild, or absent altogether. With pneumonia, shortness of breath and rapid breathing are common and can be severe. Pneumonia also tends to cause sharper chest pain, especially when breathing deeply or coughing, and people generally feel much sicker overall.
If your bronchitis symptoms are getting worse instead of better, particularly if breathing becomes difficult or a high fever develops, that progression can signal the infection has moved deeper into the lungs.
Symptoms That Need Medical Attention
Most acute bronchitis clears up without treatment. But certain symptoms indicate something more serious is happening. According to the CDC, you should seek care if you experience:
- Fever above 104°F, or any fever lasting longer than five days
- Coughing up blood, even small amounts
- Shortness of breath or trouble breathing at rest
- Symptoms lasting beyond three weeks without improvement
- Repeated episodes of bronchitis, which may point to chronic bronchitis or another underlying condition
In more severe cases, watch for bluish or gray discoloration of the lips and fingernails, which signals low oxygen levels. Feeling unusually confused, extremely lethargic, or pale also warrants prompt evaluation. For infants under three months old, any fever of 100.4°F or higher calls for immediate medical contact.
What Recovery Looks Like
With acute bronchitis, most symptoms besides the cough improve within the first week. Energy levels gradually return, fever resolves, and chest tightness eases. The cough lingers longest, and that 18-day median means many people are still coughing well into the third week. This is normal and doesn’t mean the infection is still active. The bronchial tubes remain irritated and sensitive even after the virus is gone, which keeps the cough reflex firing.
During recovery, cold air, exercise, strong scents, and even laughing can trigger coughing fits. This sensitivity fades gradually. If the cough is still going strong past three weeks with no signs of improvement, or if it keeps getting worse rather than slowly tapering off, that timeline falls outside the expected window and is worth getting checked out.