Yang xu is a traditional Chinese medical term used in diagnostics.

Clinical symptoms include:

Pale or dark complexion, tiredness and like to lie down, lack of strength, do not like physical activities, fat slippery tongue with oily look, cold limbs and dislike cold, pale color urine, weak pulse.

When yang xu (yang deficient) is accompanied by shenxu (kidney deficient) condition, it is shenyangxu (kidney yang deficient)

The opposite condition is called yinxu (yin deficient) .