Body

From the body we observe the physical constitution. This can be strong, weak, obese, thin or deformed.

Strong constitution

Large skeleton, wide thoracic cavity, musculature, lubricated skin.

Small skeleton, narrower thorax, thin musculature, relatively dry skin.

Indicates Qi and Blood deficiency.
More fragile health.
Regarding dry skin: in the skin, our most superficial layer, we have nutritive energy that flows from inside outward (yang movement), and Defensive Qi, which flows from outside inward (yin). Defensive Qi protects us from attacks of external energies by closing the pores, producing absence of sweat. When there is insufficient nutritive energy, the expansion weakens and cannot open the pores and sweat. Therefore dry skin indicates weakness of nutritive energy.

Muscular flaccidity, physical and mental asthenia.

Indicates lack of energy and that there is much Phlegm.
Fat is a tissue that does not move much energy, it is in the muscle where Qi is.
The energetic transformation (Spleen) is poor. Lack of Yang and lack of Kidney-Essence (for example in some women in menopause when weight is gained easily and weight loss is difficult). They need warming.

Weak constitution, thinness, darker and matte face, very dry skin.

Indicates Fire: heat consumes Body Fluids.
Empty-Heat: the energy cannot descend and interiorize.
Example: patients with throat cancer (passage of Lung and Stomach, descent blocked), by not interiorizing the energy it "burns up".

Hunched backs in the elderly. Malformations in children.

Weak Kidney-Essence. Kidney essence is responsible for the development of the body.
Deformations can also be due to injuries.