Can hypothyroidism go away?

Symptoms can indeed wax and wane, that's why labs are always a major consideration in the diagnosis. Yours appear to be well within the normal range except for the T3 uptake and the antibody test.

You could have Hashimoto's thyroiditis, an autoimmune disorder that can be troublesome to diagnose and treat. If you haven't seen an endocrinologist who is experienced with thyroid disease, this would be a good next step.

I had hypothyroidism that did go away. It had been pretty severe with a goiter, heart palpitations, weight gain, difficulty regulating body temp. Symptoms started when I was 18. I was treated and became symptom free until 24ish when I became pregnant with my daughter. I had to discontinue the meds since they said it would pass through the placenta and could cause problems. The symptoms didn't return.
They ran the tests after my daughter was born and my numbers were good. They said it can go away. Apparently at my age and with my pregnancy the thyroid may have become kick started and returned to normal after the pregnancy. I was checked every few years.
I am now 51 and the symptoms returned a couple of years ago. I went through menopause years ago, but I wonder if the hormonal changes for that reminded my thyroid that it was supposed to be broken. I am now working on getting the levels back to normal. It's hard because I have never been real good at consistently taking meds. Symptoms are different this time around. I have hair loss and the occasional heart palpitation. I was also told by a rheumatologist today that the swelling that caused carpal tunnel and trigger finger was probably caused by not having my thyroid under control.

I was in my own private hell for years as the doctors didn't even acknowledge IBS as a condition at the time. I also had mood swings, lack of energy, hair flying off my head and body pains that one doctor said "Only old aged people have this kind of trouble" I felt like I was falling apart. It wasn't until I got sick over and over and couldn't get healthy that my internist referred me to and ENT doc who found this tiny nodule, which led to ultrsound scan which then led to blood test which were just enough with all combined symptoms for them to take me seriously......Hashimoto's is what I was told I had and everything made sense. Not sure what to recommend cause most of your tests are in the normal ranges.

One doctor an Iuervedic (spelling?) doctor who combines eastern and western medicine looks at the thyroid antibodies, adrenal functions and more. Your vitamin D can also be a great indicator of the immune system working overtime which if you hashi's untreated, your immune system will be working harder than the average Joe......that is why I couldn't get healthy, my D was at 18. Normal range on the low end was 40.....with the thyroid being attacked the body thinks it is sick and burns up the vitamin D, which we need to get over illness....Maybe more extensive testing would help identify the cause. I keep putting this in my responses, remove Gluten from your diet....you'll thank me. It is an inflammatory product to the body and causes the autoimmune response and increases the attack on the thyroid, though its not proven in Western medicine, eastern sure supports this theory and I do too as I have personally had a change in my overall health since I removed gluten.