I had both foot and hand issues 30 yrs ago when my thyroid was malfunctioning. This causes edema under the ligaments and squeezes the nerves.

Carpal tunnel can be metabolic. You can have numbness that comes and goes.

Some things can make it worse, even if you don't have low thyroid issues.

Low blood sugars...poor blood sugar control

fluid retention

compressive issues (watch bands, or tight socks, sleeping with wrists bent)

Poor B6 levels

Alcohol use (increases fluid retention)

High sugar consumption-- increases fluid retention.

Hormone imbalances (more common in women)

Some drugs (Neurontin, and Lyrica, or some antidepressants)

Gluten intolerance.