Hello i am 28 years old healthy male with not even family thyriod history. last may (8 month ago) I was diagnosed with thyroiditis due an overactive thyriod (hyperthyrodsism). My symptoms was losing 9 kgs in about 2 months and hair thinning. My tsh was 0.01 and FT3 5.46 FT4 2.50 CBC blood test was normal ANA negative, Antithyroid anti boides negative. Thyriod ultrasound normal with hypervascularity color doppler (suggestive thyroditis) -- RAIU 0.3% (n=0.4 -4). My endo said it's a 'viral thyroiditis' and didn't give me meds but only to monitor. On 15th of July My thyriod changed to be hypothyriod! with TSH 6.26 (t3,t4 normal) then two weeks later it became 7.47 doctor said monitor since there was no symptoms. In august tsh lowered to 3.97. sept lowered to 3.17 (with also normal ft3 & ft4). Yesterday (8/jan/17) tsh reached 5.97! (Ft3 3.8 ft4 1.7 both within normal range) also antithyriod anyibodies still negative. Can u pls tell me what do I have exactly and what's going on? Although there are no any symptoms...... What type of thyroditis do I have? Or is it subclinical :( ... I wish to get answers from knowledgabe people. Many Thanks