Dangerous diseases

This world is full bad diseases, so I decided that I explain you some from their.

Asthma is a chronic disease that affects your airways. The airways are the tubes
that carry air in and out of your lungs. If you have asthma, the inside walls of your airways are inflamed (swollen). The inflammation (IN-fla-MAY-shun) makes the airways very sensitive, and they tend to react strongly to things that you are allergic to or find irritating. When the airways react, they get narrower, and less air flows through to your lung tissue. This causes symptoms like wheezing (a whistling sound when you breathe), coughing, chest tightness, and trouble breathing, especially at night and in the early morning. Asthma cannot be cured, but most people with asthma can control it so that they have few and infrequent symptoms and can live active lives.
A heart attack occurs when the supply of blood and oxygen to an area of heart muscle is blocked, usually by a clot in a coronary artery. Often, this blockage leads to arrhythmias (irregular heartbeat or rhythm) that cause a severe decrease in the pumping function of the heart and may bring about sudden death. If the blockage is not treated within a few hours, the affected heart muscle will die and be replaced by scar tissue.
A heart attack is a life-threatening event. Everyone should know the warning signs of a heart attack and how to get emergency help. Many people suffer permanent damage to their hearts or die because they do not get help immediately.
Tetanus, also known as lockjaw, is a serious but preventable disease that affects the body's muscles and nerves. It typically arises from a skin wound that becomes contaminated by a bacterium, which is often found in soil. Tetanus often begins with muscle spasms in the jaw (called trismus), accompanied by difficulty swallowing and stiffness or pain in the muscles of the neck, shoulders, or back. These spasms can spread to the muscles of the abdomen, upper arms, and thighs.
Pneumonia is a lung infection that can be caused by different types of germs, including bacteria, viruses, fungi, and parasites. Although different types of pneumonia tend to affect people in different age groups, pneumonia is most commonly caused by viruses. Some common symptoms include: fever, chills, cough, unusually rapid breathing, vomiting, chest pain, loss of appetite and so.