Firstly, there is the acute toxic effect of alcohol on the skin of your mouth and gullet, where it burns and damages the tissue. This chronic inflammation leads to cancer through changing DNA, particularly once it has led to persistent mouth ulcers that last for months. While it’s not known why some people go on to develop, for example, mouth cancer, it is known that drinking is a major contributory factor (others are smoking and the human papilloma virus or HPV). The second way is by a more indirect route, which will vary for each type of cancer . This process is thought to involve the
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