Hi, Thanks for the query. From what you have mentioned, I could not gather any symptoms for hypothyroidism. After thyroidectomy (Removal of thyroid glands) there is always a chance of Hypothyroidism, especially if it is a total thyroidectomy. If your parathyroid glands were removed, you would be also requiring certain vitamin and mineral supplementation. Since you have not mentioned about your symptoms, it would be really difficult to tell whether you are having hypothyroidism. With regards to the new lump in your neck, it is better to do a neck ultrasound scanning to see what it is. Hope you are doing regular follow ups with your treating doctor. You will need to check your thyroid hormone levels and other necessary investigations at least once in a year. Hope I have answered your question. Please let me know if you have any further queries. Thank you. Wishing you good health. Reagards