A blood taste or metallic taste in your mouth after exercise can be caused from a variety of things, although the precise cause -- unless it is tied to some underlying health condition -- may largely remain a mystery.

The bronchial tubes are the main air passages into the lungs. The bronchial tubes swell and become inflamed with the presence of an infection. A bronchial infection occurs after an upper respiratory infection, usually following a cold or occurs from irritants in the environment.

Feather pillows are not common due to their cost and the prevalence of pillows stuffed with synthetic materials. According to Best Feather Pillows, some people still prefer feather pillows because they are softer than their synthetic counterparts. Feather pillows also have a longer lifespan.

A pulmonary embolism is a blockage in the lungs usually caused by a blood clot. The symptoms include shortness of breath, chest pains, anxiety, rapid heart rate and dizziness. Many situations can lead to a pulmonary embolism, including a recent surgery, pregnancy, hypertension and smoking.

Viral or bacterial organisms cause bronchitis and pneumonia. Pneumonia results from infection of the lower respiratory system that can spread throughout the body. Bronchitis inflames the lung airways. In non-smokers, it often results from infection in the nasal passages or upper airways.

For anyone with asthma, it's important to know the treatment options available and how they work to help you breathe better. Asthma medications are used for either quick relief of symptoms or long-term control, with the goal of reducing or preventing symptoms.

Breathe in, breathe out. Other than the soft whoosh of air, no other sounds should be heard when your doctor listens to your lungs. Anything other than these regular breath sound is considered abnormal. When altered breath sounds are heard, they usually indicate a medical condition affecting the lungs or airways.

Regular physical activity generally leads to the release of endorphin hormones that leave the exerciser feeling invigorated after a good workout. Still, there are many people who find that they are often fatigued and generally do not feel well after exercising. This can trump motivation and is challenging to overcome.

Childhood asthma is a significant health problem. In 2013, nearly 50 percent of asthmatic children ages 5 to 17 reported one or more missed school days because of asthma.

Inhaling food into your lungs -- known as aspiration -- can cause serious complications, especially if you have a condition that makes you aspirate food or fluids on a regular basis. According to an article published in 2011 by "Critical Care Medicine,"

If you have bronchitis, you know that hacking cough is one of the worst parts of the illness. And if you have viral bronchitis, you have got to wait out the illness until the virus clears up.

Increased coughing is not a typical effect of caffeine consumption, but in some instances, it might have that effect. The amount of caffeine you consume, your current medical condition and your predisposition to allergies are a few things that may influence how caffeine affects you.