The abnormal condition in human body by an external foreign intoxicant by any microbe, internal injuries or tumors is known as disease. The study is known as pathology. General medicine researchers have recognised some symptoms for different diseases and these are preliminary analysing techniques.
There are several types of diseases and they well categorized and studied from several decades. They are diseases, that are specific to human anatomy causing damage to individual parts and failure of these organs leads to death of a patient’s e.g. Cardiac disease. The occurrence of malignant tumors is also a disease condition known as cancer. Infectious diseases are also a type of disease condition, where a person is infected by microbes and viruses e.g. HIV. Metabolic conditions varies and causes abnormalities in human metabolism causing a type of disease condition e.g. Obesity.