Please choose the correct ending to complete the given sentence: Health: [header] How to stop teen hair loss [title] Talk to your hair stylist about treatments and styling. [step] Some chemical processes might cause hair to break off or fall off temporarily. These include bleaching and coloring, straightening, and perms.

Ending1: Heat from straightening irons or blow-drying can also cause hair loss. [substeps] Hairstyles that pull your hair tightly can cause " traction alopecia, " in which follicles are damaged over time. Ending2: If you've tried all these but find that hair loss is not your problem, ask your stylist about treatments that might be helpful for your situation. [substeps] Other important factors to consider are age, the condition of your hair, and how often you wash your hair. Ending3: Ask your stylist about a treatment that is less damaging and take note of how it affects your hair. [substeps] If your hair breaks more easily than normal, regular bleaching is best. Ending4: The talking to your stylist about your teen's body type, size, and activity level will help them respond properly to their hair loss. They might be able to add solutions that will help your teen get healthy and develop hair.

Answer format: ending1/ending2/ending3/ending4