Lacking hair on the head.

他有一头的红头发。

youdao

He doesn't have much hair on the head.

他头发不多，而且已经灰白了。

youdao

The girl twisted her braids of hair on the head.

这女孩把发辫缠绕在头上。

youdao

Each hair on a person's head grows from a single tube-like hole in the skin called a follicle.

VOA: special.2011.04.05

The king ordered the Lord High Chamberlain out of the room and sent for his mathematician, a little man with no hair on his head.

VOA: special.2009.03.28

The laugh made the hair on my head stand up.

VOA: special.2009.02.07

Even the hair on Wiens' head, from the mid-scalp area, is part of the donor skin (the hair on the back of Wiens' head is his own).

CNN: Face transplant patient ready to go home

As a 46-year old male of the species with a dwindling amount of hair on my head, the opportunity to get a haircut that makes me feel like I rock is quite enticing I must say.

FORBES: Supercuts Rocks Out Their New Campaign

The same with the hair on his head, and on his cheeks which was indistinguishable from the hair on his body.

NEWYORKER: Ziggurat