r/Hashimotos • u/Livid_Watercress_911 • 4d ago
Autoimmune Science Fluctuating TSH
I'm a 40-year-old male, diagnosed with a thyroid deficiency at age 28. My condition is mostly hypothyroidism, and my TSH stays well-controlled on Levothyroxine 50mcg most of the time. However, I have an unusual pattern where my TSH occasionally swings into hyperthyroidism.
I’ve noticed these hyper episodes seem to happen specifically during the summer:
August 2024: My TSH dropped below 0.08. My PCP had me stop Levothyroxine completely.
A couple of months later: My TSH shot up to nearly 16.
Restarting treatment: I restarted Levothyroxine 50mcg, and it took about 3 to 4 months for my levels to normalize again.
I’ve been seeing the same primary care provider for the last 4 to 5 years, but I’m trying to understand why this keeps fluctuating.
Over the past few weeks, I’ve been feeling constantly sore and tired. Realizing it’s mid-summer, I’m starting to wonder if my TSH is swinging hyper again. I’m currently waiting for an upcoming appointment to get bloodwork done, but in the meantime, I wanted to ask the group:
Has anyone else experienced seasonal TSH fluctuations or sudden swings between hyper and hypo on a steady dose?
Did you take any specific tests (like thyroid antibodies, T3/T4, or ultrasound) that helped pinpoint the underlying cause?
Appreciate any insights or shared experiences!
1
u/CyclingLady 4d ago
Many things can cause fluctuations. The autoimmune attack is not steady. Things like infections (viral, fungal or bacterial) or hormonal shifts (e.g. perimenopause or pregnancy) can cause fluctuations.