It's something people joked about when Molly first began noticing some of her hair was falling out and thinning.
However the 17-year-old student from Newcastle realised something was wrong as the bald area on her head grew bigger.
She was eventually diagnosed with alopecia after seeing her doctor - something that is believed was caused by stress, and that began during lockdown.
Now back at school, together with her friend Hannah she reached out to ITV Tyne Tees to share her story in the hope it will help others to understand what the condition is and how it can affect people.
With the support of her school and family Molly and Hannah are fundraising for Alopecia UK.
You can watch Molly (on the right) and her friend Hannah (on the left) talking to us about baking cakes, walking 100 miles and helping others
The NHS advice is to see a GP if:
you have sudden hair loss
you develop bald patches
you're losing hair in clumps
your head also itches and burns
you're worried about your hair loss.