There are five different types of psoriasis. The most common form of psoriasis is called "plaque psoriasis," which is characterized by well-defined patches of red, raised skin. About 80 percent of people with psoriasis have this type. Plaque psoriasis can appear on any skin surface, although the knees, elbows, scalp, trunk and nails are the most common locations. The other types of psoriasis are: Guttate described as small, red, individual drops on the skin. Inverse psoriasis is smooth, dry areas of skin, often in folds or creases, that are red and inflamed but do not have scaling Erythrodermic psoriasis is characterized as periodic, widespread, fiery redness of the skin. Pustular psoriasis which involves either generalized, widespread areas of reddened skin, or localized areas, particularly the hands and feet (palmo-plantar pustular psoriasis).Typically, people have only one form of psoriasis at a time. Sometimes two different types can occur together, one type may change to another type, or one type may become more severe. For example, a trigger may convert plaque psoriasis to pustular.
Pustular psoriasis usually appears as a large red area covered with yellow-green pustules. They tend to be one to two millimeters in diameter and are quite tender. The yellow color is caused by masses of white blood cells (polymorph leucocytes), which flood into any part of the skin that is damaged or infected, in order to fight infection and aid recovery.After seven to 10 days, the pustules become dispersed and a brown scale appears. This scale will start to shed as new pustules develop in other areas, often in a continuous cycle. The most common type of pustular psoriasis affects the palms and soles. It isn't normally itchy however it can be sore or uncomfortable to use either your hands or feet, for example if you are writing or walking.
Researchers believe the immune system sends faulty signals that speed up the growth cycle in skin cells. Certain people carry genes that make them more likely to develop psoriasis, but not everyone with these genes develops psoriasis. Instead, a "trigger" makes the psoriasis appear in those who have these genes. Also, some triggers may work together to cause an outbreak of psoriasis; this makes it difficult to identify individual factors.Possible psoriasis triggers include: emotional stress; injury to the skin; some types of infection; reaction to certain drugs. Once the disease is triggered, the skin cells pile up on the surface of the body faster than normal. In people without psoriasis, skin cells mature and are shed about every 28 days. In psoriatic skin, the skin cells move rapidly up to the surface of the skin over three to six days. The body can't shed the skin cells fast enough and this process results in patches also called "lesions" forming on the skin's surface.
Treatment of psoriasis is determined by the location, severity and history of psoriasis in each individual. There is no one method of treatment, for each person with psoriasis may respond differently. One main objective of treatment is to slow down the more rapid than usual growth rate of the skin cells. The rapid growth rate of skin cells causes the red, scaly psoriasis patches. The underlying cause of this increased skin growth is not yet known. For patients with minimal psoriasis, therapy is limited to topical medications that are drugs applied to the skin. For patients with moderate to widespread psoriasis, topical treatments are often combined with ultraviolet light therapy. Either sunlight or artificial ultraviolet light therapy can be used. If topical and ultraviolet light therapy are not effective, or are not practical, systemic or oral medications can be used. These may be combined with ultraviolet light therapy, the so-called photo-chemotherapy or PUVA therapy. In severe cases and unresponsive cases of psoriasis, there are oral medications that slow down the growth rate of skin which are helpful. These drugs can have significant side effects and have to be used with the proper safeguard and caution. Even these strong drugs do not cure psoriasis but only help to control the disease.
It is important to treat psoriasis in as many ways as possible: those who modify their lifestyles, eating habits and reduce their level of stress often experience a much greater degree of psoriasis clearing. While you try to treat the symptoms of the skin (psoriasis) that are most visible and distressing, you should try treating the cause! If we find and treat the cause, then maybe all the symptoms of psoriasis need not occur! Good health for your skin as well as your entire body may require a permanent lifestyle change that will reward you with a longer life and more beautiful skin to wear during those extra years.
Erythrodermic psoriasis is the most uncommon form of psoriasis and is characterized by intense redness and swelling, exfoliation of dead skin, and pain. Erythrodermic psoriasis usually develops during the course of chronic psoriasis, however in some cases it may be the initial type of psoriasis even in children (Camisa 74). Individuals with this type of psoriasis may experience chills, low grade fever, and may be rather uncomfortable (Camisa 75).
Guttate psoriasis is characterized by small red dots (or drops) of psoriasis. Guttate is derived from the Latin word gutta meaning "drop." It often appears on the trunk, arms and legs. The lesions may have some scale. Guttate psoriasis frequently appears suddenly following a streptococcal infection or viral upper respiratory infections. There are also other events that can precipitate an attack of guttate psoriasis: tonsillitis, a cold, chicken pox, immunizations, physical trauma, psychological stress, illness, and the administration of anti-malarial drugs. Guttate psoriasis is many small patches of psoriasis, all over the body, and often happens after a throat infection. Guttate Psoriasis most often affects children and young adults. It appears as small, red bumps-the size of drops of water-on the skin. It usually appears suddenly, often several weeks after an infection such as strep throat.
Plaque psoriasis is defined as raised, inflamed (red) lesions covered with a silvery white scale. The scale may appear on any skin surface, though the knees, elbows, scalp, and trunk are the most common. Sometimes the patches of infected skin are large, extending over much of the body. The patches, known as plaques or lesions, can wax and wane but tend to be chronic. These can be very itchy and if scratched or scraped they may bleed easily. The plaques usually have a well-defined edge and, while they can appear anywhere on the body, the most commonly affected areas are the scalp, knees and elbows. However, if the scalp is involved, you may develop psoriasis on the hairline and forehead. The actual appearance of the plaques can depend on where they are found on the body. Plaques found on the palms and soles can be scaly, however they may not be very red in color. This is due to the thickness of the skin at these sites. If the plaques are in moist areas, such as in the creases of the armpits or between the buttocks, there is usually little or no scaling. The patches are red and have a well-defined border.