What might indicate a need for medical evaluation regarding hair loss?

Sudden bald patches or thinning of hair can signify an underlying health issue and therefore warrant medical evaluation. This type of hair loss may be indicative of conditions such as alopecia areata, where the body's immune system attacks hair follicles, or other medical concerns like thyroid disorders or significant stress. Unlike gradual thinning or changes that are less pronounced, sudden hair loss can be alarming and often requires further investigation to identify potential causes and appropriate treatments.

While changes in hair color, increased hair growth, and split ends are related to hair health, they do not typically imply a medical condition that needs evaluation in the same way that sudden bald patches or thinning would. These other options may reflect changes in hair care or cosmetic appearance rather than a serious health issue.