Internal negative factors
The internal factors that can influence the health and aspect of your skin are genetics, hormones, and disease such as diabetes. Genes determine our skin type and aging process, so we cannot do much about it, except reduce the factors that would worsen our genes’ predisposition. Genes can influence our cell regeneration and biological aging; they can also determine how our sebum and sweat glands function.
Change of hormones can cause acne, especially during teenage years, or during menstruation in women. Female estrogen decreases after menopause, so the natural moisturizing function of the skin also decreases.
Some grave internal diseases can manifest at the skin level such as diabetes, cancer, and most commonly liver issues - intoxication, or bile malfunctioning. Liver issues manifest either as skin rashes or yellowish pigmentation of the skin. Hence, in many cultures, there is an old mentality that glowing, smooth skin indicates an internal healthy body. What you eat is what you are, and shown on the skin, so healthy, and vitamin-rich diets are a must for healthier skin. Other internal factors that can affect the skin are severe medical treatments such as There are also viruses that affect the skin by eruption such as varicella and variola viruses.