Philadelphia is the largest city in Pennsylvania and the sixth most populous city in the United States. It is the fifth largest metropolitan area and fourth largest urban area by population in the United States, the nation's fourth largest consumer media market as ranked by the Nielsen Media Research, and the 49th most populous city in the world. It is the county seat of Philadelphia County. A popular nickname for Philadelphia is The City of Brotherly Love. The city is recognized as a strong candidate global city. In 2005, the population of the city proper was estimated to be over 1.4 million, while the Greater Philadelphia metropolitan area, with a population of 5.8 million, was the fifth-largest in the United States. A commercial, educational, and cultural center, the city was once the second-largest in the British Empire (after London), and the social and geographical center of the original 13 American colonies. During the 18th century, it eclipsed New York City in political and social importance, with Benjamin Franklin taking a large role in Philadelphia's early rise to prominence. It was in this city that some of the ideas, and subsequent actions, gave birth to the American Revolution and American Independence, making Philadelphia a centerpiece of early American history. It was the most populous city of the young United States and served as the the nation's second capital in 1774.

Cognitive Behavioral Therapy

Doctors developed cognitive behavioral therapy as a method of preventing relapse when treating a patient with problem drinking. Later cognitive doctors adapted behavioral therapies to help individuals addicted to cocaine. Cognitive behavioral strategies stem from the theory that learning processes play a critical role in the development of maladaptive behavioral patterns. Individuals learn to identify and correct problematic behaviors by applying a range of different skills to stop drug abuse and to address other problems that often exist with it. Therapies for treating alcohol, marijuana, cocaine, methamphetamine and nicotine exist. Cognitive behavioral therapy generally consists of a collection of strategies that aim to enhance self control. Specific techniques include: exploring the positive and negative consequences of continued use, monitoring oneself to recognize drug cravings early on and to identify risky situations for use and developing strategies for coping with and avoiding risky situations associated with the desire to use. A central element of cognitive behavioral therapy is anticipating problems and helping patients develop effective coping strategies. Research indicates that the skills individuals learn through cognitive behavioral approaches remain in use after the completion of treatment. In several studies, most people who choose a cognitive behavioral approach to recovery showed progress throughout the following year. Current research focuses on how to produce effects that are even more powerful by combining cognitive behavioral therapy with medications for drug abuse and with other types of behavioral therapies. Researchers are also evaluating how best to train treatment providers to deliver cognitive behavioral therapy.

Vitiligo

Vitiligo or leukoderma is a chronic skin disease that causes loss of pigment, resulting in irregular pale patches of skin. The precise cause of vitiligo is complex and not fully understood. There is some evidence that suggests a combination of autoimmune, genetic and environmental factors causes vitiligo. The incidence of vitiligo worldwide is between one and two percent. According to the Diseases Database, the disorder appears in of areas of macular depigmentation, commonly on extensor aspects of extremities, on the face or neck, and in skin folds. The age of onset is often in young adulthood and the condition tends to progress gradually with lesions enlarging and extending until a quiescent state is reached. Half of the people living with vitiligo develop patches of de-pigmented skin appearing on extremities before their 20s. The patches may grow, shrink or remain constant in size. Patches often occur symmetrically across both sides on the body. Occasionally small areas may re-pigment as they are recolonised by melanocytes. The location of vitiligo affected skin changes over time, with some patches re-pigmenting and de-pigmenting.

Epiderme

Epiderme is the one-stop for skin care. Moisturizers help keep skin youthful with elasticity. The epidermis is the outer layer of the skin. The epidermis helps the skin to regulate body temperature. The epidermis with the dermis forms the cutis. The epidermis is composed of four to five layers of skin, depending on the region of skin. The epidermis contains no blood vessels and nourishment of cells is by diffusion in the deepest layers from blood capillaries extending to the upper layers of the dermis. The amount and distribution of melanin pigment in the epidermis results in skin color variation in Homo sapiens. Melanin is in the small melanosomes, particles formed in melanocytes from surrounding keratinocytes. The size, number and arrangement of the melansomes varies between racial groups, but while the number of melanocytes can vary between different body regions, the number of melansomes remain the same in individual body regions in all human beings. In white and oriental skin, the melansomes aggregate but are small in size. Comparatively, in black skin, the melansomes are larger and distributed more evenly. The number of melansomes in the keratinocytes increases with UV radiation exposure, while their distribution remains largely unaffected.

Sensitive Skin

Sensitive skin is a thin or a fine-textured skin that reacts quickly to both heat and cold and therefore sunburns and windburns easily. It is commonly dry, delicate and prone to allergic reactions. Temperature changes, some detergents, cosmetics and alcohol (used on the skin) can all cause irritation, leaving the skin red and blotchy, with visible surface veins. The skin is the largest organ of the human body. Its size (about 20 square feet on an average sized adult) and external location make it susceptible to a wide variety of diseases, disorders, discolorations and growths, as well as to damage from the environment and the aging process.