Chronic obstructive pulmonary disease (COPD) is an inflammatory disease that affects the lungs by obstructing the airflow. Chronic bronchitis and emphysema are two conditions that play a big role in COPD and they both occur together usually. The main reason for COPD is smoking and the inhalation of other irritating gases.

Oxygen concentrators are medical devices used for delivering oxygen to patients with breathing-related disorders. Patients with lower than normal oxygen concentrations in their blood may require the use of such an oxygen concentrator to compensate for that oxygen. Normally, your lungs absorb the oxygen in the air and transfer it to your bloodstream.

Hepatitis C is a viral liver infection, leading to inflammation and chronic damage to the organ. The hepatitis C virus (HCV) is the causal organism of this disease. There are five stages of this infection- incubation period (time between the contact with the virus and the appearance of symptoms), acute hepatitis C (short-term illness lasting for six months), chronic hepatitis C (long-term infection), cirrhosis (scarring and severe inflammation of the liver), and liver cancer (malignancy in the liver).

Breast cancer is a type of cancer that develops in the breast cells and affects the lobules or the ducts of the breast. The gland which produces milk is the lobule and the pathways through which milk is brought from the glands to the nipple are the ducts. In some cases, the cancer also develops in the fatty tissues of the breast.

A condition identified by a dysfunctional or dead heart muscle segment, caused due to loss of blood supply is referred to as a heart attack. The supply of blood is commonly lost as a result of a blockage in an artery due to a blood clot. When the heart muscle is dead, there is an electrical instability of heart muscle tissue and the person suffers from severe pain in the chest.

Teeth discoloration can happen due to a varied range of reasons. Usually, the core reasons include poor oral hygiene, consumption of tobacco, and the use of certain medicines. Thankfully, most of the stains on the teeth are curable and preventable. However, for that, you must know what causes teeth discoloration, what are the different types of stains, and what are the effective ways of teeth whitening that can help you keep your pearly whites shining.