Should subclinical hypothyroidism be treated?

Sometimes: If it is truly subclinical, meaning that there are no associated symptoms or signs of too little thyroid hormone, a doctor may choose to just watch, and recheck hormone levels in a few months. But many people with "subclinical" hypothyroidism do have symptoms and signs of low thyroid levels, if a doctors asks the right questions or looks closely, and these people would benefit from treatment.

Yes if symptomatic: If you are symptomatic, certainly. If not symptomatic, consider detox and thyroid supportive measures to see if your thyroid function improves.

Yes: Hypothyroidism can be primary - caused by a weak thyroid gland or secondary to other hormonal problems, like a pituitary problem. Or your thyroid can become dysfunctional secondary to high insulin, estrogen or cortisol. If you have functional hypothyroidism, this problem can go undetected by routine screening tests. More extensive testing can often reveal abonormalities. This is very common.