Acupressure is a science that deals with the human body and the flow of natural energy within the body. It is a science, and there is nothing supernatural or magical about acupressure. This medical science is practiced with the use of only one human tool: the thumb. Pressure is applied on different 'pressure points' on the body, stimulating the corresponding glands of the body.
The science of acupressure is based on a theory that is totally different from allopathy (i.e. Western medicine). The theory states that the human body has fourteen "imaginary meridians" that carry energy throughout the body. These meridians start at the fingertips, connect to the brain, and then connect to the organ associated with the specific meridian. The names of these meridians specify the organ associated with them. For example, the lung meridian is connected to the lungs via the nervous system.
Theoretically, a lung problem arises if there is an obstruction in the lung meridian that slows down the flow of energy. If somehow the obstruction is removed or dissolved, the energy flow becomes regular and the lungs start functioning well.
How is the obstruction removed? The answer to this question defines the basic concept of Acupressure.
Students are taught to give Acupressure for specific diseases with its detail understanding and methodology.