Parabens: A group of preservatives used in skin care products, toxic thought to be a prime factor in increasing the risk of breast cancer

Papules: Small raised bumps that may open when scratched and become crusty and infected

Papilloma: A small solid benign tumor with a clear-cut border that projects above the surrounding tissue.

Perl èche (also termed angular cheilitis) is a softening of the skin with deep creases around the angles of the mouth.

Pemphigus vulgaris: Pemphigus vulgaris (PV) is one of a group of chronic, relapsing auto-immune diseases causing blistering of the skin and mucosal membranes. Substances called antibodies produced by the immune system normally attack hostile viruses and bacteria. In a person with pemphigus, the immune system mistakenly regards the cells in skin and mucous membranes as foreign, and attacks them

Perioral Dermatitis: Perioral dermatitis is a common skin problem that affects young women and occasionally, men or children. "Perioral" refers to the area around the mouth, and "dermatitis" indicates a rash or irritation of the skin. The areas most affected by perioral dermatitis are the facial lines from the nose to the sides and borders of the lips, and the chin. The areas around the nose, eyes, and cheeks can also be affected. There are small red bumps, mild peeling, mild itching, and sometimes burning associated with perioral dermatitis. When the bumps are the most obvious feature, the disease can look like acne.

Phlebectomy: A treatment for varicose veins. The enlarged vein is removed through tiny incisions made along its length. The procedure is called ambulatory phlebectomy when it is performed in an outpatient facility and the patient goes home the same day.

Photoaging/Photodamage: Photodamage may be chronic or acute; acute photodamage is a sunburn. Photoaging and photodamage (dermatoheliosis) are terms used interchangeably to describe those chronic changes in the appearance and function of the skin caused by repeated sun exposure

Pilonidal cyst: This is a unique kind of abscess that occurs in the crease of the buttocks. Pilonidal cysts often begin as tiny areas of infection in the base of the area of skin from which hair grows (the hair follicle). With irritation from direct pressure over time the inflamed area enlarges to become a firm, painful, tender nodule making it difficult to sit without discomfort. These frequently form after long trips that involve prolonged sitting.

Pityriasis lichenoides: Is a rare skin disorder that appears as a red or brown rash at first and of unknown aetiology divided into an acute and a chronic form. The chronic form shows elevated, reddened, dome-shaped papules in a symmetrical distribution, which enlarge, flatten, and show a fine scale on their surface.

Pityriasis rosea: Pityriasis rosea is a rash that occurs most commonly in people between the ages of 10 and 35, but may occur at any age. The typical rash begins with a single lesion – known as a herald patch (also called primary plaque of mother patch) -- that heralds the onset of a more generalized rash that comes after a variable period of time.

Pityriasis rosea :Is a harmless skin disease marked by patches of pink, oval rash that sometimes itch over the torso, neck, arms and legs. Pityriasis rosea usually avoids the face, although sometimes a few spots spread to the cheeks. The oval patches follow the line of the ribs like a fir tree. They have a dry surface and may have an inner circlet of scaling.

Pityriasis rubra pilaris: A mildly itchy chronic skin disorder characterized by the association of palmoplantar keratoderma, follicular plugging and erythematous perifollicular papules which may leads to plaques or erythroderma and is usually present with reddish-orange coloured scaling patches with well defined borders

Plantar warts: Caused by the human papilloma virus (HPV). Plantar warts are benign growths that occur on the sole, heel, or ball of the foot.Small lesions are typically "cauliflower-esque" in appearance. Though "plantar wart" refers specifically to HPV infection on the sole of the foot, infection by the virus is possible anywhere on the body and common especially on the palm of the hand. Pressure from standing and walking often causes them to grow into deep layers of the skin.

Plaque psoriasis: Psoriasis characterized by red, silvery-white, scaly skin lesions (most common variety of psoriasis).

Photoaging: The damage that accumulates in the skin from years of excessive and chronic sun exposure. Photoaging accounts for much of the facial "old look" associated with aging.

Poison ivy, oak, and sumac: Are plants which cause an itchy skin rash when directly contacted. The rash is a true allergic response to an oil called urushiol found in the sap of these plants.

Psoriasis: A chronic skin condition that most commonly appears as patches of raised, red skin covered by scale. These patches, or plaques, are commonly found on the elbows, knees, lower back, and scalp.

Pseudofolliculitis Barbaeis: A common condition of the beard area. As naturally curly hairs begin to grow back after shaving, waxing or plucking, they get trapped inside the follicle, resulting in irritation and swelling

Pruritus: A sensation that provokes the desire to scratch. Itching can be a significant source of frustration and discomfort for patients. When severe, it can lead to loss of sleep, anxiety, and depression.

Pustule : An inflammatory comedo that resembles a whitehead with a ring of redness around it. A pus-filled pimple.