What does it mean if you dream that you have no hair?

It depends what baldness means to you and how literal the dream is. Maybe you are simply obsessed with your appearance, or maybe you know someone who is bald. It could represent a fear of embarrassment or a fear of getting cancer. Chemotherapy for cancer causes hair loss.

In some cultures, forcibly cutting off someone's hair means that person committed an act of shame. That is often done to those judged to be traitors, prostitutes, and adulteresses. The shame aspect of baldness seems to originate in religious texts. So you may feel guilty or ashamed over something, and in a dream, your subconscious mind may use baldness to symbolize guilt or shame.