evidence: Mucus doesn’t cause arthritis, multiple sclerosis, and other conditions; cold weather doesn’t "detox" the body of excess mucus Mucus is an important part of maintaining our health and excess mucus is triggered by infections or reactions to environmental factors. While excess mucus can be a symptom of disease, there’s no evidence that it causes bronchitis, arthritis, multiple sclerosis, psoriasis, or glaucoma. These conditions each have their own individual causes, and attempts to "detox" mucus will not prevent them. [...] There is no basis for suggesting that mucus is the cause of bronchitis, arthritis, MS, psoriasis, or glaucoma. While excess mucus can appear as a symptom or in conjunction with some of these diseases, it is not involved in the initial trigger. Cold weather doesn’t "detox" the body of mucus and this wouldn’t prevent any of the diseases listed.