Thyroid nodules growing fast may be caused by inflammatory nodules, malignant nodules, intracapsular hemorrhage, etc. The nature of thyroid nodules should be clarified before treatment. 1. Inflammatory nodules: viral infection, bacterial infection, autoimmune abnormality and other factors can cause inflammatory nodules to grow fast, and the nodules may have pain and other uncomfortable symptoms, which may be accompanied by fever. 2. Malignant nodule: thyroid nodule grows faster, we should consider the possibility of malignant nodule, we can carry out puncture biopsy of thyroid nodule to confirm the diagnosis, and take surgery, chemotherapy, radiotherapy and other treatment methods. 3. Intracapsular hemorrhage: Most of the intracapsular hemorrhage of thyroid gland is caused by rupture of small blood vessels. If the amount of hemorrhage is small, cold compresses and other methods can be used for treatment; if the amount of hemorrhage is large, surgical treatment is needed. Thyroid nodules grow fast, first need to clarify the cause of the disease, to take targeted treatment.