A patient sat across from me last winter and said something I hear almost every week: "I'm doing everything right, and I still feel like I'm wading through wet cement." She was sleeping eight hours. She was eating well. And she was exhausted, cold all the time, and gaining weight she couldn't explain. Her bloodwork told the story in about ninety seconds. She had hypothyroidism, an underactive thyroid, and once we treated it, she got her life back.
If any of that sounds familiar, keep reading. Hypothyroidism is common, it's easy to test for, and it's one of the more satisfying things I get to treat, because the fix is straightforward and people genuinely feel better.
What does hypothyroidism actually do to your body?
Hypothyroidism means your thyroid gland isn't making enough hormone to keep your metabolism running at the right pace. That little butterfly-shaped gland in your neck sets the tempo for nearly everything: how you burn energy, how warm you feel, how fast your heart beats, even how clearly you think.
When it slows down, you slow down. The symptoms creep in gradually, which is part of why so many people chalk it up to stress or aging or "just getting older."
Common signs I look for include:
- Fatigue that sleep doesn't fix
- Unexplained weight gain or trouble losing weight
- Feeling cold when everyone else is comfortable
- Dry skin, thinning hair, brittle nails
- Constipation, brain fog, or low mood
How do I know if I have a thyroid problem?
The only way to know for sure is a blood test, not a symptom checklist. Plenty of these complaints overlap with other conditions, which is exactly why guessing doesn't work.
In my practice I start with thyroid function testing, usually TSH and sometimes free T4. TSH is the hormone your brain uses to nudge the thyroid; when the thyroid is sluggish, TSH climbs as your body tries to compensate. A high TSH with a low T4 is the classic pattern.
Because the symptoms are so general, I often check a few things at the same time. Fatigue and low mood can also point toward anemia or depression, and it's not unusual for someone to have more than one thing going on. Testing everything at once saves you weeks of back-and-forth.
What is the treatment for an underactive thyroid?
The standard treatment is a daily thyroid hormone replacement, most often levothyroxine, which simply gives your body the hormone it isn't making enough of on its own.
Here's what I tell patients so they're not surprised. We start at a sensible dose, recheck your TSH in about six to eight weeks, and adjust. Thyroid treatment isn't a one-and-done prescription; it's a little bit of fine-tuning until your numbers and your energy line up. Most people land in a good place within a couple of visits.
Take it on an empty stomach, ideally in the morning, and give it some space from coffee, calcium, and iron supplements, which can blunt how well it's absorbed. Small habit, big difference.
Will treating my thyroid help me lose weight?
It can help, but it's usually not the whole answer. When your thyroid is severely underactive, treatment can shed some of the fluid and sluggishness that came with it. What it won't do is melt away weight that built up for other reasons.
I'm honest with patients about this. If weight management is part of your goal, we treat the thyroid first to level the playing field, then build a real plan around nutrition, movement, and sometimes medication. Fixing the thyroid removes a roadblock. It doesn't replace the rest of the work.
Why this matters in everyday Los Angeles life
People here are busy, ambitious, and used to pushing through. I see a lot of patients across Los Angeles who assumed their exhaustion was the cost of a full schedule, when it was actually a thyroid that needed a small daily nudge. You shouldn't have to white-knuckle your way through the day.
Untreated hypothyroidism isn't just uncomfortable. Over time it can affect your cholesterol, your heart, and your mood. The reassuring part is that it's one of the most manageable conditions I treat, and most people feel meaningfully better within weeks of starting therapy.
If you've been dragging through your days and something feels off, don't write it off as normal. A simple blood test can give us real answers. I'd be glad to take a look and figure this out with you, so please reach out and let's talk it through.