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Trichotillomania

From SNPedia

At a minimum, these SNPs are known to be related, and others may also be

 Max Magnitude
rs1933028615

Trichotillomania (TTM), also known as hair pulling disorder, is a mental disorder characterised by a long term urge that results in the pulling out of one's hair.Wikipedia

As OMIM reports, heritability estimates for trichotillomania are relatively high (between 0.76 to 0.78), suggesting that a significant proportion of trichotillomanic behavior may be due to genetic factors.

A gene with some mutations reported to be associated with trichotillomania is the SLITRK1 gene.