Washing your hair with salt water for a long period of time can have side effects such as dry, tangled hair and increased dandruff. Usually, washing hair with low concentration salt water occasionally is usually without side effects, but there is no scientific evidence that it will act as anti-dandruff and hair care. If you wash your hair with salt water for a long period of time, it may damage the scalp, hair shaft, and hair follicles, so washing your hair with salt water for a long period of time may result in dry, knotted, dull hair, inflammation of the scalp leading to increased dandruff, and dry scalp. In addition, if there is a scalp allergy phenomenon, it may also cause scalp itching, pain and other symptoms. So it is not recommended to wash hair with salt water for a long time….