Acquired kinky hair syndrome, also known as acquired progressive kinking of the hair (APKH), is a rare hair disorder where the hair changes its texture progressively. The hair typically becomes lustreless, curly, frizzy, and coarse, and these changes generally start during adolescence. The condition largely affects the frontal, temporal, and vertex regions of the scalp, meaning that these areas are most likely to show the hair texture alterations. In some cases, the eyelashes, as well as the overall growth and pigmentation of the hair, may also be affected. This summary is based on a trusted definition that describes the visual changes in hair quality seen in people with this condition. Understanding this condition is important for recognizing the pattern of hair changes that occur over time.

People with acquired kinky hair syndrome may notice that their hair becomes dull in appearance, curly, and frizzy. The texture turns coarse and the changes are most noticeable on the front, sides, and top of the scalp. In addition, there can be changes in how the eyelashes look as well as in the growth pattern and color of the hair.

Information about causes is currently limited for this condition. There is no known genetic marker or specific risk factor identified from the current trusted sources.