It's normal to lose 50 to 100 hairs per day as part of your hair's natural growth cycle, which includes growth, resting, and shedding phases. However, excessive hair loss, thinning, or bald patches may signal a condition known as telogen effluvium or androgenetic alopecia. Factors like stress, hormonal changes, nutritional deficiencies, or certain medical conditions can also contribute to hair loss.