Persistent cough
After the exposure to asbestos walls or building, the asbestos fibers we inhale in our body goes to the pleura of the lungs and results in the inflammation and swelling of the lungs. The inflammation of the pleura results in a higher risk of blood vessels to leak the fluids in the surrounding area. The fragile and swollen blood vessels sometimes get tender and leak the fluid in the cavity of the lungs, thus leading to pleural effusion. The main reason of this effusion is cancer, and it causes a persistent cough, which does not stop easily. Moreover, in the severe cases of malignant mesothelioma, the patient starts getting blood in his or her cough, which is extremely serious and requires sudden medical attention.