Hypothyroidism Support Group
Hypothyroidism is the disease state caused by insufficient production of thyrohormone by the thyroid gland. There are several distinct causes for chronic hypothyroidism, the most common being Hashimoto's thyroiditis and hypothyroidism following radioiodine therapy for hyperthyroidism. Advanced hypothyroidism may cause severe complications, the most serious one of which is...
For me, I feel weak or lethargy when my electrolytes are low. I felt a difference in 1 day. In the beginning it was difficult to find out why I felt so weak--like it was difficult to carry my body around, it felt like a ton of bricks.
Hypothyroidism has a tendency to deplete vitamins in our body so do research on that. I take a very good multivitamin in the morning every day and sometimes twice a day for me depending on my stress level.
Link between Adrenals and Autoimmune Thyroid Disease
This article may answer your symptom of feeling weakness.