Constant weakness and a feeling of fatigue can indicate a number of diseases. Senior therapist Olesya Savelyeva told Gazeta.Ru about this. According to the therapist, one of the reasons for weakness may be iron deficiency anemia. – Lack of iron in the body can lead to low hemoglobin levels, which causes fatigue and weakness. If you experience these symptoms in combination with decreased appetite, pale skin and nails, consult a doctor for diagnosis and treatment, Savelyeva warned. These conditions may also indicate hypothyroidism, a condition in which the thyroid gland does not produce enough hormones needed to control the body’s metabolism and energy. – Symptoms of hypothyroidism may include constant fatigue, drowsiness, apathy, weakness and slowed thinking processes. If you notice these signs, see your doctor to have your thyroid hormone levels checked, the doctor said. Another clinical disease that manifests weakness is chronic fatigue syndrome. – This is a condition characterized by long periods of severe fatigue that is not relieved by rest or sleep. Patients with CFS may also experience weakness, poor concentration, and muscle and joint pain. This syndrome requires complex diagnosis and treatment, and to establish an accurate diagnosis, it is recommended to consult a specialist,” the doctor said. Finally, weakness can also indicate depression. — Depression is a mental illness that can manifest itself with physical symptoms such as “Constant fatigue, weakness and lack of energy. Patients with depression may also experience sleep disturbances, changes in appetite, feelings of helplessness and bad mood, Savelyeva explained. “She added that constant feeling of fatigue also indicates diabetes, cardiovascular disease, chronic kidney failure, and autoimmune diseases.” diseases, infections and even some types of cancer. However, these symptoms can be the result of chronic sleep apnea, physical inactivity, medication side effects, stress, and nutritional deficiencies.