Hair loss Losing your hair isn't usually anything to be worried about but it can be upsetting. Treatment may help with some types of hair loss. Causes of hair loss It's normal to lose hair. We can lose between 50 and 100 hairs a day, often without noticing. Hair loss isn't usually anything to be worried about but occasionally it can be a sign of a medical condition. Some types of hair loss are permanent, like male and female pattern baldness. This type of hair loss usually runs in the family. Other types of hair loss may be temporary. They can be caused by: an illness stress cancer treatment weight loss iron deficiency 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 What happens at your appointment Your GP should be able to tell you what's causing your hair loss by looking at your hair. Tell your GP if your hair loss is affecting your wellbeing and ask what treatments are available.