Patients with low blood lipids can experience symptoms such as weakness and fatigue and are associated with the primary disease. This is because patients with low lipids are part of a special population, such as patients who have recently reduced their intake significantly and lost weight, i.e., they have eaten too little recently, while their blood lipids are lower. In contrast, patients with wasting disease, such as those with diabetes, sometimes have lower cholesterol but not necessarily lower triglyceride levels. In hyperthyroidism, i.e., when the body is in a high metabolic state, the breakdown is greater than the body’s synthesis, so the blood lipids will be lower. Patients with chronic tumors and other wasting diseases can also lead to low blood lipids. In addition, patients with digestive tract diseases, whose digestive function is poor and who eat very little, have low blood lipids. Therefore, the presence of low lipid symptoms is often associated with symptoms of the primary disease. The symptoms of hyperthyroidism patients are more hyperactive, extraordinarily sweaty, bulging eyes, shaky hands, and thinning, so the blood lipids are lowered. In contrast, the wasting in tumor patients is due to low nutritional indicators, which include lowered lipids.