Had Subacute Thyroiditis But Stable. Am I At Risk Of Developing Hashimoto Disease?
The key is to diagnose the type of thyroiditis. Subacute thyroiditis is just one sub-type. There are several other kinds. In the autoimmune variety, it is possible for the individual to have a greater susceptibility to develop hypothyroidism in the future. However the best approach is to monitor the thyroid function over time, through blood tests. If they stay steady then infrequent monitoring is justified.
Sometimes, the thyroid function evidenced by TSH/free T4 can go from hyperthyroidism to normalcy to hypothyroidism and then back to normal. Being a young woman is definitely a risk factor for being vulnerable to thyroid disorders. Having positive blood test for thyroid antibodies such as TPO and TG auto-antibodies confers a greater likelihood of developing the condition.
I also agree with your family doctor's suggestion to monitor it once or twice a year in the form of blood tests, or symptom-guided, meaning if you feel you are experiencing symptoms suggesting an overactive or underactive thyroid you may wish to get checked.
this weblink describes what you may expect if you became hypothyroid
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And the following one refers to 'hyper'thyroidism:
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