4. Sudden hair loss
Hair loss is nothing to be alarmed about. People shed up to 100 hairs every day. However, if you suddenly start to lose lots of hair for no apparent reason, it may be a sign of a health issue. If you start to lose your eyelashes and brow hair, you may want to visit a doctor. Sudden hair loss can be caused by thyroid problems, hyperthyroidism or hypothyroidism. These issues are often accompanied by hair loss.