Notice a widening part line
Check for more scalp showing through the hair
Look for a receding hairline at the temples
Compare current photos with older photos
Watch for increased hair shedding on pillows, in the shower, or on brushes
See if your ponytail or hair volume feels thinner than before
Check for patchy thinning on the crown or top of the head
Notice if your hair takes longer to style because it is less dense
Look for shorter, finer, or weaker hairs in thinning areas
Ask a trusted person if they notice visible thinning
Track changes over several weeks or months
Consider a dermatologist if hair loss is rapid, patchy, or sudden