What is the normal range for TSH levels?

Is a 4.9 TSH level "normal" or "high?"?

  • For the past 2 years I have gone from 148lbs to 178lbs(I am 5.9). It is DIFFICULT to lose weight. Currently I have been able to go down to 170lbs but it has taken months after months to just lose those 8lbs. The scale will not budge any further. I have been extremely tired and fatigued daily, constipated, menstrual cycles off, dry hair, dry/cold skin, forgetful and in a brain fog. Everyday I at least need to shut my eyes for twenty minutes in the middle of the day. It's horrible! So - feeling completely hopeless - I saw my doctor. My thyroid was enlarged with a tsh level of 4.9. He started me on a very low dose or Synthroid(25mcg) because it is on the higher side.. but isn't calling it hypothyroid yet because it is in normal range of .5 to 5.0. I am completely frustrated and confused! If it is normal to have my thyroid enlarged and feeling fatigued and crappy daily that makes no sense! I looked around and found out that "The American Association of Clinical Endocrinologists recommends patients receiving levothyroxine therapy, such as synthroid, to keep their levels between .3 to 3.0." So is a 3.0+TSH level hypo or is it 5.0+? What is a good range to be in?

  • Answer:

    There's a lot of debate about what a normal TSH level is. The reference range is different depending on the lab and doctors, so unless they have a lot of experience with thyroid disorders, they tend to go with whatever the reference range is. I tend to think that TSH should be on the lower end of the range to be truly normal. When I was diagnosed, my TSH was over 9. I got it down into the 4 range, but I still had symptoms. Not until my TSH dropped close to 1 did I feel normal. My doctor felt that 2-3 was fine, but if you're still symptomatic in that range, then it's NOT fine, and you should try to get your thyroid closer to the lower end of the range. Another matter that complicates issues is that a lot can go wrong with the thyroid, so even if your TSH is in range, that doesn't mean your other measures of thyroid (T3 free, T4 free, etc.) are normal. If your TSH gets between 1-2 and you're still gaining weight and feeling lousy, ask your doctor to run a full thyroid panel. You may also think about getting referred to an endocrinologist should the Synthroid not work. I really sympathize with you. I was gaining weight, cold all the time, pale, weak, depressed, having trouble sleeping, dealing with irregular and heavy periods, and I even started losing the ends of my eyebrow hair. If it's any comfort, I got the thyroid under control and lost almost all the weight I needed to lose. Periods are now normal. My body temperature is hard to regulate, but it's better than it was.

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There's a lot of debate about what a normal TSH level is. The reference range is different depending on the lab and doctors, so unless they have a lot of experience with thyroid disorders, they tend to go with whatever the reference range is. I tend to think that TSH should be on the lower end of the range to be truly normal. When I was diagnosed, my TSH was over 9. I got it down into the 4 range, but I still had symptoms. Not until my TSH dropped close to 1 did I feel normal. My doctor felt that 2-3 was fine, but if you're still symptomatic in that range, then it's NOT fine, and you should try to get your thyroid closer to the lower end of the range. Another matter that complicates issues is that a lot can go wrong with the thyroid, so even if your TSH is in range, that doesn't mean your other measures of thyroid (T3 free, T4 free, etc.) are normal. If your TSH gets between 1-2 and you're still gaining weight and feeling lousy, ask your doctor to run a full thyroid panel. You may also think about getting referred to an endocrinologist should the Synthroid not work. I really sympathize with you. I was gaining weight, cold all the time, pale, weak, depressed, having trouble sleeping, dealing with irregular and heavy periods, and I even started losing the ends of my eyebrow hair. If it's any comfort, I got the thyroid under control and lost almost all the weight I needed to lose. Periods are now normal. My body temperature is hard to regulate, but it's better than it was.

TheOrange Evil

TSH numbers can be confusing so heres some help.Oh hi by way,ive had my own thyroid condition and have been going thru long term treatment.Tsh levels can variate depending on what the doctors put you on.If your number is high(like a 4 or 5) that tells you your thyroid is underactive.If your tsh level drops too low(like 1 or 2) your thyroid is hyperactive.The middle is where a healthy thyroid should be(3-4).The 25mcg's they put you on is a good start,but be prepared for more blood tests.They will want to keep monitoring your tsh levels and adjust your pills accordingly. -The menstrual cycle being off is also come with thryoid conditions.you can very easily spot/skip/or have excessive days.As your tsh levels change,so will your cycle.I would however,speak to you doctor about any autoimmune disorders,there are several out there and can usually be linked straight back to your thyroid.Best of luck.

Seeker

TSH numbers can be confusing so heres some help.Oh hi by way,ive had my own thyroid condition and have been going thru long term treatment.Tsh levels can variate depending on what the doctors put you on.If your number is high(like a 4 or 5) that tells you your thyroid is underactive.If your tsh level drops too low(like 1 or 2) your thyroid is hyperactive.The middle is where a healthy thyroid should be(3-4).The 25mcg's they put you on is a good start,but be prepared for more blood tests.They will want to keep monitoring your tsh levels and adjust your pills accordingly. -The menstrual cycle being off is also come with thryoid conditions.you can very easily spot/skip/or have excessive days.As your tsh levels change,so will your cycle.I would however,speak to you doctor about any autoimmune disorders,there are several out there and can usually be linked straight back to your thyroid.Best of luck.

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The thyroid is a butterfly-shaped gland that sits low on the front of the neck. Your thyroid lies below your Adam’s apple, along the front of the windpipe. The thyroid has two side lobes, connected by a bridge (isthmus) in the middle. When the thyroid is its normal size, you’re unlikely to be able to feel it. All types of hyperthyroidism are due to overproduction of thyroid hormones, but the condition can develop in several ways. Thyroid hormone production can be suppressed or halted completely in these ways: https://tr.im/gLIxf

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