Can I wash my hair with only water?

no, i dont think so, if you wash your hair just with water than it is just getting your hair wet, not washing the body oils and stuff from your hair, i think that just wettin your haill will make it worse, or thats what if feels like when i come oout of the pool with not the cleanest hair......if your alergic to somthing in your shampoo then go to your doctor and ask him to find a shampoo that fits your needs. my dad had dry skin and he got a perscription for a special shampo and if worked really well for him!.....hope i helped!!! plese rate best answer?! :P