How asbestos affects your health

How the harm happens

Asbestos is dangerous when its fibres become airborne and are breathed in. When asbestos-containing material is damaged or disturbed, it releases a dust of tiny fibres — small enough to travel deep into the lungs.

Your body clears most foreign particles, but some asbestos fibres lodge in the lung tissue and stay there. Once embedded, they can cause scarring and inflammation that builds up over time.

The conditions linked to exposure

Inhaling asbestos fibres is associated with several serious diseases, including:

• Asbestosis — scarring and inflammation of the lungs, causing shortness of breath, wheezing, coughing and chest pain.
• Lung cancer.
• Mesothelioma — a cancer of the lining around the lungs and other organs, strongly associated with asbestos.

These are serious, often irreversible conditions, and there is no cure for asbestosis or mesothelioma. This is general information — for medical advice, speak to your doctor.

Why the long delay matters

Asbestos-related disease has a long latency period: symptoms typically don’t appear until decades after exposure — often 20 to 50 years later. That delay is exactly why asbestos is so easy to underestimate. People can be exposed during a renovation, a repair or a day’s work and feel completely fine, with no warning that anything has happened.

It’s also why “I felt OK afterwards” is no reassurance, and why prevention — not reaction — is the only sensible approach.

The practical takeaway

The whole point of testing and licensed handling is to stop fibres becoming airborne in the first place. If material is intact and undisturbed, the immediate risk is low. The danger is in disturbing it — so before you cut, drill, sand or demolish anything in an older building, find out whether it contains asbestos first.