Acne is a disorder of the skin, which usually occurs in adolescence especially in
people with a strong family history of allergic disorders.
It is the term for plugged pores (blackheads and whiteheads),
pimples, and even deeper lumps (cysts or nodules) that occur on the face, neck,
chest, back, shoulders and even the upper arms. While not a life threatening condition,
acne can be upsetting and disfiguring. Severe acne can lead to serious and permanent
scarring.
The underlying cause of Acne, which affects approximately 80% of all teenagers,
is the increase in quantity of androgens secreted, or increased sensitivity
of the sebaceous glands to androgens. These glands are found in areas where acne
is common (the face, upper back, and chest). Rarely, Acne can be due to a hormonal
imbalance.
Certain foods especially to which the patient is allergic also causes an increase
in the activity of the sebaceous glands. The most common offenders are chocolates,
nuts, cheese and fatty foods.
Types of ACNE
A comedo is a sebaceous follicle plugged with sebum, dead cells from inside the
sebaceous follicle, tiny hair, and sometimes bacteria. When a comedo is open, it
is commonly called a blackhead because the surface of the plug in the follicle has
a blackish appearance. A closed comedo is commonly called a whitehead; its appearance
is that of a skin-colored or slightly inflamed "bump" in the skin.
SEBORRHOEIC DERMATITIS/DANDRUFF
Dandruff, or shedding of dead skin cells from the scalp at an excessive rate, is
the result of normal growing process of skin cells of the scalp. Dandruff scales
appear dry, white or grayish, small, unsightly patches, especially on top of the
head.
It has been observed that dandruff is more common in people with a family history
of allergic manifestations. In this condition there is diffuse scaling of the scalp.
It may be of dry or greasy variety.The condition can spread to other hairy regions
of the body e.g. eyebrows, beard, axilla, genitalia etc.
It is triggered by overactive oil glands, food allergies, stress, excessive perspiration,
too harsh shampoos and further aggravated by endocrine disorders, unbalanced diet,
constipation etc.
ALOPECIA
At any one time, about 10 percent of the hair on scalp is in resting phase.
After 2 to 3 months, the resting hair falls out and new hair starts to grow in its
place. This growing phase lasts for 2 to 6 years. Each hair grows approximately
1 centimeter per month during this phase. About 90 percent of the hair on scalp
is growing at any one time. It is normal to shed some hair each day as part of this
cycle. However, some people may experience excessive (more than normal) hair loss.
Partial or complete loss of hair, most commonly of the scalp occurrs as a consequence
of genetic or hormonal factors. It may be associated with dandruff. Hair loss may
occur without scarring or gross atrophic changes (noncicatricial) or may follow
inflammation, tissue destruction or scar tissue formation (cicatricial).
PIGMENTATION DISORDER
Skin pigmentation disorders are conditions that cause the skin to appear lighter
or darker than normal, or blotchy and discolored. A condition called vitiligo,
creates smooth, depigmented white spots on the skin. Any part of the body may be
affected, but the most common sites are hands, face, trunk and legs. In hyperpigmentation,
the body produces too much melanin, causing skin to become darker than usual.