Excess washing your hair may cause harm to hair.
Washing hair is not related to hair loss. But a shampoo of inferior quality can cause hair loss. Being cautious of what chemicals we put in our hair is wise. Every day shampoo will not cause hair loss. The hairs seen in the shower could be due to normal hair shedding or hereditary hair loss - but shampooing in itself does not cause hair loss.
Infact,washing is not related with hair loss.use shampooes wisely. Always use good quality shampoo.