Early-Stage Lung Can,cer May Not Begin With a Cough: Watch for These 5 Common Warning Signs Instead

of the earliest warning signs that is frequently overlooked is the appearance of clubbing, a condition in which the fingertips become enlarged and the nails curve downward.

Doctors explain that clubbing is associated with long-term oxygen deficiency. Some lung tumors may release substances that stimulate abnormal tissue growth in the fingers. Many people continue reading …