The skin is our largest organ, and can reveal secrets regarding our health. Moles and/or brown spots may indicate current or past infection that has erupted onto the skin, been transferred to the skin by self-inoculation, been transferred to the skin by devices, or be evidence of a past scabies infection that evolved into a mole. Pimples indicate an infection on the skin, often transferred by fingertips and devices; and acne may indicate an underlying chronic infection. When blood vessels become inflamed, it can be reflected on the skin as a skin rash or mottling, as may occur in covid-19 and several other diseases. When skin changes color or texture, it may indicate an underlying illnesses; and the color of the skin may be a clue to the source of the problem, such as when the person appears more green or yellow. When skin becomes thin and easily broken, it may indicate an endocrine problem. When skin becomes hot or has a significant rash, it may be a sign of underlying infection; or sign of a systemic infection, such as measles.