Lung cancer symptoms are not always confined to the lungs, breathing and coughing. Sometimes there are lesser known signs of other parts of the body.

According to the "Express" site, finger fracture is a symptom of lung cancer, and it occurs when the nails begin to bend and can be an early warning sign of a fatal disease.

Three in 10 people with lung cancer may experience symptoms of finger fracture, according to studies.

One of the major changes to pay attention to is a sign that is referred to as "Scarmouth", which is the curvature of the nails more than usual when viewed from the side.

Fingers tend to happen in stages, according to Cancer Research UK, which is:

Ripple and weakness of the nail bed

- The normal angle measure between the nail bed and nail fold

Increased nail fold convexity

Increase the entire thickness of the distal tip (the end of the finger)

Glitter and cracking of the nail and skin

Before the "Scarmoth" sign appears, the nail base becomes smooth and the skin next to the nail layer becomes shiny.

Cancer Research UK said finger fracture means specific changes in the shape of your fingers and nails.

"People with heart or lung problems sometimes face these changes. Fingering fingers are unusual, and if you are concerned about these symptoms, talk to your doctor."

A person must perform an X-ray on the chest to examine the heart and lungs when this sign appears. Fingertip fingers are thought to result from fluid accumulation in soft tissues at the tips of the fingers.

This is caused by blood flowing to the area more than usual, but the reason for this has not been understood, according to Cancer Research UK

Other warning signs of lung cancer include:

Cough that does not go away or get worse

Coughing up blood or phlegm in rust color

Chest pain is often worse with deep breathing, coughing or laughing

- Hoarseness

- Anorexia

Feeling tired or weak

Infections such as bronchitis and pneumonia that do not go away or continue to return

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