My tsh level is 0.4 which is too low, but i have had rapid weight gain. What would cause weight gain?

Question

I have a history of hypothyroid but my blood levels are hyperthyroid for my tsh. I have gained 15 pounds since July, I am extremely tired all the time, my hair is thin & falling out. If my tsh is very low why am I not losing weight which would be normal for hyperthyroid? Could something else be making me have a false tsh reading, or possibly an adrenal gland problem? Help, I feel miserable.

I already take Synthroid, but i still feel bad.

Answer 1

People are making ignorant statements on here and I bet you're all confused. The RN who posted above is dead wrong and needs to consult her old nursing textbooks and maybe take a refresher course. Scary. Here is how things work:

People with hypothyroid have high TSH because their brains are telling their thyroids to work harder, but their thyroids aren't listening. It's kind of like how you can try to get somebody to do something but they're not listening, so you keep asking them over and over again. Your brain is asking your thyroid to do something and it's not listening, but your brain isn't ready to give up. This situation gives hypothyroid symptoms and the problem is with the thyroid.

People with hyperthyroid have lower TSH because their brains are trying to reduce stimulation to the thyroid and this is done by not sending as much TSH. The thyroid here is working too hard and causes hyperthyroid symptoms. The problem is likely with the thyroid.

Above is what happens when your brain is working right, but your thyroid is dysfunctional.

Sometimes though, your brain doesn't read your thyroid correctly and it sends the thyroid the wrong level of TSH. That means your thyroid is okay, but your brain isn't working right. This could be what is happening to you. The problem may be with the part of your brain that reads your thyroid and sends TSH (the pituitary gland).

But honestly, it could also be that neither your pituitary or your thyroid is working right. It could also be that your doctor gave you too much synthroid and now your brain and thyroid are confused and don't know what to do. It could be other things too.

As you suggested, you want your doctor to check your pituitary gland to see if that is contributing to the problem.

The pituitary gland regulates other body activities also, including water balance and blood pressure. You definitely want to have a good doctor working on your side to figure out what's going on. A malfunctioning pituitary gland could cause fluid balance problems, which could explain your weight gain.

And how rapid have you gained weight? If it's been 5 pounds in the past few days without any major change in your diet, then your pituitary issues could be causing a heart condition. Please see a doctor ASAP if your weight gain has been rapid over the past few days.

If you feel especially tired, weak, short of breath, have swelling, dizzy, have any major change in mental function, loss of consciousness, then you need the emergency room.

Make sure you are working with an *endocrinologist*, not a family doctor or general practitioner.

Answer 2

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RE:
My tsh level is 0.4 which is too low, but i have had rapid weight gain. What would cause weight gain?
I have a history of hypothyroid but my blood levels are hyperthyroid for my tsh. I have gained 15 pounds since July, I am extremely tired all the time, my hair is thin & falling out. If my tsh is ver...

Answer 3

I'm at the same level but, when the doctor adjusts it, I'm either too high or too low but never where it's in range. This has been going on for 9 years and it looks like no answer in sight. I am trying to find out answers by going on these websites of people who actually have the same issues and hoping someone has an answer. It all started when Armour Thyroid was reformulated. I was allergic to some of the fillers and had to find out the hard way as Forest Labs didn't let anyone know they were reformulating their thyroid medicine. Don't feel bad, I just hit the 62 lb. weight gain and I use to be 106-110 lbs. Wish doctors would stop worrying about how much money they will make off us and start figuring out whats going on.

Answer 4

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Technically low TSH levels signal HYPER-thyroidism meaning that you would be losing too much weight and be very skinny. High TSH would signal primary hypothyroidism with subsequent weight gain. On the other hand, a low TSH with low T4 and T3 - and hypothyroidism symptoms could signal secondary hypothyroidism. Unless your doctor considers this possibility, he will NOT put you on thyroid medication based on a low TSH. They say that healthy people (with no weight problems) have naturally low TSH levels, but symptoms are most important in distinguishing between hyper and hypo-thyroidism.

Answer 5

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