Is the sudden onset of extreme muscle tightness in the entire length of both legs something very serious?
Probably muscle cramps, follow the advice below to confirm the cause.
Your symptoms seem to be related to muscle cramps.
Muscle cramps are caused by many medical conditions such as diabetes, thyroid disorders or magnesium and calcium deficiency.
Commonly they can be related to magnesium deficiency.
So, I'd suggest the following examinations:
-a complete blood count
-a glycemic blood level
-a thyroid hormone levels
-magnesium and calcium levels
Meanwhile, some advice that I can give to you is:
-use cold or hot compresses
-take anti-inflammatory medications (eg. Ibuprofen) in case of pain
-stretch the muscles for relief.
Hope my answer was helpful.
If you have further queries feel free to contact me again.
General and Family Physician
The tightness shifts can be normal phenomena so don't worry.
If you had felt the difference in muscle tightness when you don't take thyroid medications than the symptoms are probably related to thyroid hormone levels.
The tightness shifts are as normal as it can be because thyroid hormones has receptors everywhere in the system.
So, I'd suggest you not to worry about it.
I suggest you to continue the supplements and do the examinations for further treatment.
You are always welcome in the future for any other queries.
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