Yes. Your hair could start being a haven for lice.
Washing hair after dyeing it You can but each time you wash it a little bit of color will wash out. Especially if your using a semi color and not a permanent hair color tint.Washing hair everyday...
there hair is probably oily
The chemicals in shampoo and conditioner can cause damage to your hair if used too often.
shampoo is no problem but conditioners certainly not.