Cancer patients may be afraid of cold, but fear of cold is not necessarily a manifestation of cancer, it may also be related to other reasons, such as cold, hypothyroidism, nutritional deficiency, low blood pressure, etc. Most cancer patients have low immunity due to the erosion of the immune system by tumor cells. Most cancer patients may suffer from low immunity due to the erosion of the immune system by tumor cells, which may easily be attacked by various pathogenic microorganisms and lead to infections, such as fungi, viruses, bacteria, etc. After infection, symptoms such as fever and fear of cold may appear; however, the manifestation of fear of cold may also be related to other reasons, which may not necessarily be caused by cancer. 1. Cold: when the body resistance is low, it is easy to be disturbed by viruses, thus forming a series of inflammatory reactions, such as upper respiratory tract mucous membrane edema, congestion, etc. At this time, it is easy to be manifested as runny nose, nasal congestion, sore throat, fever, etc. Fever is also accompanied by skeletal muscle clonus, so it will be manifested by fear of cold and chills. 2. Hypothyroidism: due to the weakening of energy metabolism, the basal metabolic rate decreases, and the body is in a low metabolic state, so there will be chills. 3. Nutritional deficiencies: due to insufficient intake of nutrients, the body cannot produce enough heat, and the symptoms of chills are also likely to occur. 4. Low blood pressure: During low blood pressure, blood circulation slows down and blood supply is poor, which can also cause chills. There are many reasons for chills, and simple chills are not necessarily caused by cancer; besides the above reasons, environmental factors and underdressing may also cause chills; if the symptoms exist for a long time and are difficult to be relieved, it is necessary to consult a doctor as soon as possible to avoid delaying the condition.