Why is the thyroid cancer swelling again after half a year?

Thyroid cancer is a malignant tumor that originates from the thyroid follicular epithelium or parafollicular cells. If the swelling recurs after half a year, it may be caused by recurrence, or it may be caused by factors such as inflammatory reaction, allergic reaction, hypothyroidism, etc. It is recommended to receive targeted treatment under the guidance of a doctor.

1. Recurrence: If a thyroid cancer patient finds a lump again after half a year, it may be caused by a recurrence of the disease. It is recommended to go to the hospital's surgery department in time for a clear diagnosis through B-ultrasound, blood routine tests, etc., and perform surgery to remove the tumor in time.

2. Inflammatory reaction: If a thyroid cancer patient has an inflammatory reaction again after half a year, tissue edema may occur due to local inflammatory stimulation. You can use iodine-containing disinfectant, iodine tincture and other drugs to disinfect the local skin.

3. Allergic reaction: If the thyroid cancer patient has an allergic constitution and is exposed to allergens such as pollen and dust mites six months later, it may cause an allergic reaction in the body. At this time, you can use chlorpheniramine tablets, cetirizine hydrochloride tablets and other drugs for treatment as prescribed by the doctor.

4. Hypothyroidism: If a thyroid cancer patient undergoes surgery six months later and all thyroid tissue is removed during the operation, excessive thyroid tissue may be removed, leading to reduced synthesis and secretion of thyroid hormones, thus causing hypothyroidism. This will lead to reduced metabolism in the body, sodium and water retention, and neck swelling. This can be treated with drugs such as levothyroxine sodium tablets.

In addition to the above factors, it may also be caused by metastasis of thyroid cancer. Patients are advised to go to the hospital's tumor surgery department in time for treatment and complete CT, X-ray and other examinations to confirm the diagnosis.