Pallor
Pallor is a pale color of the skin that can be caused by illness, emotional shock or stress, stimulant use, or anemia, and is the result of a reduced amount of oxyhaemoglobin and may also be visible as pallor of the conjunctivae of the eyes on physical examination.
Pallor is more evident on the face and palms. It can develop suddenly or gradually, depending on the cause. It is not usually clinically significant unless it is accompanied by a general pallor (pale lips, tongue, palms, mouth and other regions with mucous membranes). It is distinguished from similar presentations such as hypopigmentation (lack or loss of skin pigment) or simply a fair complexion.

Causes
migraine attack or headache
excess estradiol and/or estrone
osteoporosis
emotional response, due to fear, embarrassment, grief, rage
anorexia
anemia, due to blood loss, poor nutrition, or underlying disease such as sickle cell anemia
iron deficiency
vitamin B12 deficiency
shock, a medical emergency caused by illness or injury
acute compartment syndrome
frostbite
common cold
cancer
hypoglycaemia
bradycardia
panic attack
medications
ketorolac
amphetamines
ethanol
cannabis
lead poisoning
motion sickness
heart disease
Peripheral vascular disease
hypothyroidism
hypopituitarism
scurvy
tuberculosis
sleep deprivation
pheochromocytoma
squeamishness
visceral larva migrans
Orthostatic hypotension
methyldopa
loss of appetite
Space adaptation syndrome
fibromyalgia
Buergers disease
Hypovolemia

References


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