Eating and fiending are related to addiction, but have different psychological aspects. Eating is often described as a physical or mental state in which a person experiences discomfort due to a lack of a substance. This may be expressed as severe anxiety, nervousness, or even pain. In contrast
https://unitedrecoveryproject.com/rehab-blog/feening-vs-fiending/ , fiending involves not only a physical desire for a substance, but also more complex psychological processes. It may be an attempt to avoid emotions or experiences, which leads to pathological substance seeking.