2. How Thyroid Problems Affect the Body

When the thyroid produces too much or too little hormone, the body may react in different ways. These changes can affect your skin, hair, energy levels, weight, mood, and nails. Because nails grow from living tissue, changes in hormone balance may influence how strong, smooth, or fast-growing they are.

3. Nail Changes Linked to Hypothyroidism

Hypothyroidism, or an underactive thyroid, happens when the thyroid does not produce enough hormone. This can slow many body processes. People with hypothyroidism may notice dry