A chronic cough that gets worse can be an early symptom of lung cancer. If your cough is bothersome and has been hanging on, it’s a good idea to speak with a doctor.
Coughs are one of the most common reasons people see a doctor. While most coughs have benign causes, a severe cough that persists may indicate a more serious underlying condition.
If lung cancer is involved with the cough, the earlier it’s detected, the better the outcome. Often early lung cancer has no noticeable symptoms, so it’s usually diagnosed
Are there specific characteristics of a cough related to lung cancer?
Coughs that are related to lung cancer often have specific traits that differentiate them from coughs caused by other conditions. Having a cough with these characteristics doesn’t mean you have lung cancer, but they can indicate conditions that a doctor should treat.
Any type of lung cancer can be associated with a cough. But some forms of lung cancer more often have a cough as a symptom because the cancerous cells are obstructing the airways in your lungs.
Squamous cell carcinoma and small cell undifferentiated lung cancer are more likely to be associated with a cough.
When determining the cause of your cough, certain characteristics may be more associated with lung cancer than others. These include:
- a chronic cough (usually lasting more than 8 consecutive weeks)
- a cough that is either dry or productive (it produces mucus)
- a cough that interferes with sleep
- coughing up blood (hemoptysis)
- chest pain alongside coughing
- shortness of breath
- lung conditions like bronchitis or pneumonia that recur or persist
Not everyone with early lung cancer has a cough. The Lung Cancer Alliance states that about 50 percent of people have a cough in the early stage of lung cancer, before the cancer cells have spread to other parts of the body.
A 2017 study reports that about 57 percent of people with lung cancer have a cough. In late-stage lung cancer, the percentage is higher.
There are some studies that indicate that lung cancer coughs may also be linked to gastrointestinal issues, though more research is needed.
There’s no simple way to tell if lung cancer is the cause of your cough. Your cough may be benign or may be associated with any number of underlying diseases. Doctors use
Your doctor will ask about your medical and smoking history to begin to determine the cough’s cause. They’ll ask about other accompanying symptoms, such as fever, cold, fatigue, shortness of breath, hoarseness, chest pain, or weight loss.
They’ll also want to know when your cough began, whether it’s worse at night, and when it got worse or developed new features.
If the doctor suspects lung cancer, they’ll order screening and other tests to confirm a diagnosis.
An older 2005 study that looked at the symptoms of British lung cancer patients at the time of their diagnosis found that in addition to cigarette smoking, there were several common symptoms associated with lung cancer at diagnosis:
- spitting up blood (hemoptysis)
- weight loss
- loss of appetite
- difficulty breathing (dyspnea)
- chest pain
The strongest associations with lung cancer, in addition to smoking, were:
- spitting up blood
- difficulty breathing
- abnormal breathing patterns
Coughs, both acute and chronic, can have many causes. An acute cough is defined as lasting less than 3 weeks. A chronic cough is one that lasts more than 8 weeks.
The most common causes of a chronic cough are:
- postnasal drip
- acid reflux (gastroesophageal reflux disease or GERD)
- blood pressure drugs (ACE inhibitors)
- chronic bronchitis
- chronic obstructive pulmonary disease (COPD)
- obstructive sleep apnea
- chronic snoring
- chronic tonsil enlargement
Other less common causes include:
- bronchial diseases
- cystic fibrosis
- whooping cough
- lung inflammation
- heart failure
Having a persistent cough is one of the early symptoms of lung cancer, before the cancer has spread (metastasized) beyond your lungs. About half of the people with early lung cancer have a chronic cough.
In one study, coughing up blood was
Other symptoms of lung cancer include:
- changes in your cough’s intensity or production of mucus
- increasing shortness of breath (dyspnea)
- pain in the chest, shoulders, or back
- hoarseness or other changes in your voice
- pneumonia or other recurrent lung problems
- weight loss
Once the cancerous cells have metastasized to other parts of your body, you may have other symptoms.
The most common places that lung cancer spreads are:
- other areas of your lungs
- lymph nodes
- adrenal glands
Symptoms of metastasized lung cancer include:
- bone pain or joint pain
- headaches, if there’s a brain infection
- swelling in your neck or face
- loss of appetite
- weakness and fatigue
You may have other symptoms, depending on the organ where the cancer has spread.
If you’re worried about a lingering cough, speak with your doctor to discuss possible causes and treatment. If you’re coughing up blood, talk with a doctor right away.
If lung cancer is suspected because of your symptoms or your lung cancer risk, there are many tests your doctor may order to determine if it’s cancer or something else. Diagnostic tests include:
- chest X-rays or a CT scan
- analysis of your sputum to look for cancer cells
- biopsy, including a bronchoscopy or needle biopsy
If your cough ends up being related to lung cancer, you’ll want to take a few steps.
Depending on the stage of your lung cancer and your general health, you may have surgery to remove the cancerous lung tumor.
You may also have chemotherapy, radiation, or other treatments to relieve pain and kill the cancer cells.
But sometimes these treatments may not relieve your cough. In some cases, a cough may be a side effect of the lung cancer treatment.
A chronic cough with lung cancer can be exhausting. It can
A 2017 study and a
To remedy the situation, this study updated the American College of Chest Physicians (CHEST) guidelines to give doctors a specific step-by-step approach to managing lung cancer coughs.
The study recommendations include:
- identification and treatment of any coexisting conditions associated with your cough
- cough suppression exercises
- endobronchial-brachytherapy, a new treatment that focuses high-dose radiation on tumors
- use of demulcents, substances that coat and soothe mucous membranes
- use of opiates, when other remedies have failed
- use of other drugs, such as levodropropizine, moguisteine, levocloperastine, or sodium cromoglycate
- use of local anesthetics, such as lidocaine/bupivacaine or benzonatate
- participation in randomized controlled trials of new drugs that may help control a cough, such as diazepam, gabapentin, carbamazepine, baclofen, amitriptyline, and thalidomide
If you have a lingering chronic cough, speak with your doctor to find out the cause and possible treatments. The earlier lung cancer is detected, the better your chances for recovery.
There’s currently no cure for metastasized lung cancer, so early diagnosis is key.
There are, however, new and more effective treatments being developed every day. Ask your doctor about clinical trials in which you could participate.