A sebaceous cyst is a lump like lesion. It is a closed sac under the skin filled with a cheese-like or oily material.

It is also called as porous bones, osteoporosis. Osteoporosis is a condition where the bones become weak and brittle so even mild stress like bending over, lifting a vacuum cleaner or coughing van cause fracture. Bone weakness occurs due to low levels of calcium, phosphorus and other minerals in bones. It is more common in woman than in men. It is characterized by loss of normal bone density, resulting in fragile bones.

Calluses and corns are circumscribed areas of hyperkeratosis at a site of pressure or friction. Calluses are more superficial and usually asymptomatic; corns are deeper and may be painful. Calluses and corns are caused by intermittent pressure or friction, usually over a bony prominence (eg, heel, metatarsal heads).

Acne, commonly called pimples or zits is a localized skin inflammation resulting from over activity of oil glands at the base of hair follicles. It can occur at any age but is most commonly seen at puberty.

Anorexia nervosa is an eating disorder often marked by an unnatural fear of weight gain, compulsive exercising, self-starvation, a distorted body image, and amenorrhea, or absence of at least three consecutive menstrual cycles. There are two sub-types of anorexia nervosa ? restricting and binge-purge. Restricting anorexia nervosa is characterized by strict diet and exercise. Binge-purge is marked by periods of compulsive eating with or without self-induced vomiting and the use of laxatives or enemas. Although many diagnosed with anorexia nervosa recover, the disorder can lead to death.