Greasy hair

Greasy hair is a condition in which the scalp and hair become excessively oily. Symptoms include an oily scalp, greasy-looking hair, and a strong odor. It usually develops gradually over time, and can be caused by a variety of factors, such as hormones, genetics, diet, and stress. It can manifest in different forms, such as thinning hair, dandruff, and an itchy scalp. Treatment depends on the underlying cause.