How do you bend notes on harmonica?

Bending notes on a harmonica involves altering the pitch of a note by changing the shape of your mouth and adjusting your breath. To bend a note, draw (inhale) on the harmonica while tightening your throat and lowering your tongue to create a constricted airflow, which lowers the pitch. Practice on draw notes, typically on holes 1 to 6, as these are easier to bend. With time and experimentation, you can achieve the desired pitch and control for expressive playing.