The following explanation depends on the type of skin, complexion, level of physical activity, and a bunch of other factors, but at least it helps us roughly identify certain symptoms. General practitioners are especially trained to recognize these shades, but you can learn too.

1. Red: This is mostly a reaction to stress, anger, fear, or some other extreme emotional state. It can also be a result of food or drink we have consumed.

2. Orange: This color mostly appears in problems with the pancreas or spleen.

3. Yellow: A yellowish face is a subtle warning that something is wrong with your liver and gallbladder.

4. Green: Can occur as a result of digestive problems, too much medication consumption, urinary issues, but very often it is a sign of hypochromic anemia or iron deficiency in the blood.

5. Blue: Usually a sign of increased hemoglobin concentration in the body, meaning oxygen deficiency.

6. White: A pale face is a sign of thyroid gland weakness and inactive liver. It also indicates a weakened immune system, anemia, and often is a sign of kidney problems.