Lung cancer is especially dangerous because its symptoms often do not appear until the harmful cells have already spread through the body. However, there are some early warning signs you might be able to spot. Common indicators include breathlessness, wheezing, and a persistent cough that may bring up blood or mucus. While lung cancer is typically linked to respiratory problems like a chronic cough, shortness of breath, or chest discomfort, experts note that noticeable changes in your fingertips and nails can sometimes serve as early alerts for this potentially serious disease.What Is Lung Cancer?Lung cancer is a malignant growth that begins in the tissues of the lungs, usually from DNA damage in the cells lining the airways, which then grow uncontrollably to form tumors. Smoking is a major contributor, but other factors such as exposure to radon, asbestos, or inherited genetic conditions can also play a role. Symptoms often include a persistent cough, chest pain, and difficulty breathing. Lung cancer is mainly classified into two types: Non-Small Cell Lung Cancer (NSCLC) and Small Cell Lung Cancer (SCLC), according to the Cleveland Clinic.Types Of Lung CancerAlthough many cancers can develop in the lungs, the term “lung cancer” usually refers to two main types: non-small cell and small cell lung cancer.Non-Small Cell Lung Cancer (NSCLC)NSCLC is the most common form, accounting for more than 80% of lung cancer cases. Common subtypes include adenocarcinoma and squamous cell carcinoma, while adenosquamous carcinoma and sarcomatoid carcinoma are less frequent forms of NSCLC.Small Cell Lung Cancer (SCLC)SCLC tends to grow more quickly and is more challenging to treat than NSCLC. It is often detected as a small tumor that has already spread to other areas of the body. Types of SCLC include small cell carcinoma (also known as oat cell carcinoma) and combined small cell carcinoma.Lung Cancer Symptom On FingersHave you ever pressed your fingernails together and noticed a small diamond-shaped space of light? If that gap is missing, it could be a sign of finger clubbing, a condition where the ends of the fingers swell, which may indicate lung cancer. This change occurs gradually, starting with the base of the nail becoming soft. Next, the skin around the nail bed may appear shiny, followed by the nails curving more than usual when viewed from the side.Eventually, the tips of the fingers can enlarge and swell as fluid builds up in the soft tissue. While a missing diamond-shaped gap between your nails doesn’t automatically mean you have lung cancer, it can be a warning sign. If you notice this, it’s wise to consult your doctor.What Are The Warning Signs Of Lung Cancer?Lung cancer can present differently in every individual. Some people show multiple symptoms, while others may have none.Key signs to watch for include:Swelling in the face or neckA cough that changes or worsensFrequent chest infectionsShortness of breathChest or shoulder painWheezingCoughing up blood or blood-stained phlegmHoarsenessA persistent cough lasting three weeks or longerUnexplained fatigue or low energyWhile these symptoms don’t automatically confirm lung cancer, it is recommended to see your GP if you notice any of these issues.