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The cause of Parkinson’s Disease is unknown, but it results from a loss of nerve cells in certain regions of the brain responsible for movement. These nerve cells are responsible for the production of a chemical called dopamine.

Peptic Ulcer Disease is defined as the presence of ulcers or sores in the lining of the intestinal tract, usually in your stomach or duodenum

Pneumonia is an inflammation of the lungs caused by bacteria, viruses, or chemical irritants. It is a serious infection or inflammation in which the air sacs fill with pus and other liquid.

Post-traumatic Stress Disorder (PTSD) is a condition that sometimes develops after a person has experienced or witnessed a traumatic event, such as an accident or a violent assault.

Pre-diabetes is a condition that is a pre-cursor state to Type 2 Diabetes. If you have prediabetes, you will have higher than normal blood sugars

Psoriasis is a skin rash that frequently consists of inflamed, red, raised areas that often develop as silvery scales on the scalp, elbows, knees, and lower back.

A pterygium is an elevated, wing-shaped growth that forms on the surface of the eye. If it grows large enough it may cause irritation and begin to cause problems with vision.

Pulmonary embolism (PE) is a blood clot that has formed in the lung.