If the condition of our extra cellular fluids, especially the blood, becomes acidic, our physical condition will first manifest tiredness, proneness to catching colds, etc.  When these fluids become more acidic, our condition then manifests pains and suffering such as headaches, chest pains, stomach aches, etc.  According to Keiichi Morishita in his Hidden Truth of Cancer, If the Blood develops a more acidic condition, then our body inevitably deposits these excess acidic substances in some area of the body such so that the blood will not be able to maintain an alkaline condition which causes these areas such as the cells to become acidic and lowers in oxygen.

As this tendency continues, such areas increase in acidity and some cells die; then these dead cells themselves turn into acids.  However, some other cells may adapt in that environment.  In other words, instead of dying - as normal cells do in an acid environment - some cells survive by becoming abnormal cells.  These abnormal cells are called malignant cells.  Malignant cells do not correspond with brain function nor with our own DNS memory code.  Therefore, malignant cells grow indefinitely and without order.  This is cancer.  Cancer is formed from an acid enviroment and over acidity.

Title: Acid and Alkaline
Publisher: Ohsawa, George Macrobiotic Foundation
Copyright: 1986 | Revised 5th Edition
Author: Herman Aihara