Increased density in the thymic region alone may be due to a thymic tumor or just general lymph node inflammation. Thymic tumors occurring in the anterior mediastinum are usually asymptomatic in the early stage, and can be detected by physical examination, with the imaging manifestation of increased density in the thymic region, and with the progression of the disease, the patient will experience symptoms such as cough, chest tightness, shortness of breath, and dull chest pain. When thymic tumor is suspected, fine needle biopsy and puncture should be carried out in time to clarify the pathological type, and surgery should be carried out in time. Inflammation of the lymph nodes in the thymus can also lead to increased density in the thymic region. Usually, the inflammation is mild and can be self-healed, and when the inflammation is severe, the prognosis is better with the use of medication. Inflammation of the lymph nodes is more likely if the density decreases on review after the use of anti-inflammatory drugs. Increased density in the thymus region is recommended to consult a doctor in time for further treatment under the guidance of a specialized doctor.