Generally, mild thymic hyperplasia is not life-threatening. Most mild hyperplasia has no clinical symptoms, but if the volume increases and the surrounding organs are compressed, it may cause respiratory distress and myasthenia gravis in severe cases. Thymic hyperplasia is usually caused by secondary factors, further examination is needed to find the primary cause, and appropriate treatment measures should be taken according to the situation. If necessary, you can go to the thoracic surgery department.