Neither gel nor hairspray causes hair loss. Shampoos, frequent washing, dandruff, and most hairstyles won’t cause hair loss either. If you’re concerned about thinning hair or shedding and wondering what you’ve been doing wrong, there’s probably a problem below the surface in your hair or scalp. The only styling factor that might cause hair loss is pulling hair back tightly with continued traction. This can cause permanent hair loss. If you’re seeing a problem, be sure to shield your hair from damaging treatments, and see a hair loss specialist as soon as possible to find out what’s really going on.