Lung cancer is one of the most serious types of cancer to be diagnosed, since it is usually difficult to detect until it has spread to other parts of the body. But, it is also one of the most common cancers to be diagnosed in the UK, warned the NHS. Signs of the disease only tend to expose themselves once the cancer has spread through the lungs. You may be at risk of lung cancer if you notice your phlegm has a red tint to it, it was claimed.
Red streaks in your phlegm can be a sign that blood is present, according to the Healthline Health website.
Finding blood in your mucus or phlegm is an early warning sign of lung cancer, added charity to the British Lung Foundation.
Although it does not necessarily mean that you have lung cancer, it is still a good idea to talk to a doctor, he said.
"Often you will not have any symptoms of lung cancer until the tumor becomes quite large," Charity said.
"This means that it can only be discovered when you have X-rays or scanning for some other reason.
"As your condition progresses, you will begin to experience symptoms, such as coughing, feeling of breath, blood, mucus, or phlegm.
"If you have these symptoms, you should see your doctor." Having these symptoms does not necessarily mean that you have lung cancer – they are common and have many different causes.
"People with long-term lung disease may already have many, but it's very important to tell your doctor if your normal symptoms are changing or getting worse."
The blood in your mucus – which is a mixture of saliva and mucus – can come from anywhere along your respiratory system.
There are a number of causes of blood phlegm phlegm, including bronchitis, nosebleeds, and other chest infections.
It can even be caused by pneumonia, cystic fibrosis, or tuberculosis.
Other symptoms of lung cancer include a cough that will not go away, with a hoarse throat, or a short sensation.
You should talk to a doctor if you are concerned about signs or symptoms of lung cancer.
Around 45,000 people are diagnosed with lung cancer in the UK each year.
The outlook for lung cancer is not as good as other types of cancer, since the symptoms are usually only detected in its later stages.
One in three patients live at least one year after their diagnosis, while one in 20 lives another 10 years.