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rash nonspecific term for an eruption of the skin . It may result from skin allergy, skin irritation, or skin disease, or it may be a symptom of a systemic disease like measles, smallpox, or scarlet fever. A rash may appear as discolored spots or a general redness, or as blisters or pustules, either flat or raised above the surface of the skin. The rash may cause skin irritation—itching, tingling, burning, or pain—or it may not cause any discomfort. The appearance and distribution of a rash are often important factors for consideration in diagnosing a particular disease.
You may discover these lesions when you are bathing. You can visualize
the area by using a small mirror while you are sitting on the edge of
the tub and holding it slightly below the vagina. There should not be
any small blisters that are fluid –filled, or very painful,
because these are symptoms of a Herpes infection. Symptoms of allergic
reactions include an itchy, very red rash, and are not symptoms of a
warty viral lesion.
Eczema is a chronic skin disorder that involves scaly and itchy rashes.
Causes
Eczema is due to a hypersensitivity reaction (similar to an allergy) in the skin, which leads to long-term inflammation. The inflammation causes the skin to become itchy and scaly. Long-term irritation and scratching can cause the skin to thicken and have a leather-like texture.
Eczema is most common in infants. The condition tends to run in families.
People with eczema often have a family history of allergic conditions such as asthma, hay fever, or eczema.
- Dry skin
- Exposure to environmental irritants
- Exposure to water
- Stress
- Temperature changes
Symptoms
- Blisters with oozing and crusting
- Dry, leathery skin areas
- Ear discharge or bleeding
- Intense itching
- Rash
In children younger than age 2, skin lesions begin on the cheeks, elbows, or knees
In adults, the rash is more commonly seen on the inside of the knees and elbows
- Raw areas of the skin from scratching
- Skin coloring changes -- more or less coloring than the normal skin tone (See: Skin abnormally dark or light)
- Skin redness or inflammation around the blisters
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Common warts that ap pear on the back of the hands are called palmar
warts. They can also grow on the fingers, or around the nails. They
are a different type from that of the HPV virus that causes genital
warts. These are small, but can grow larger and can have a rough or
smooth feeling to them. They can be skin colored or darker. Sometimes
they have black pinpoint areas at the tip of the wart which are cause by
tiny blood vessels under the skin.
Transmission of the virus can take place during the time that children
share toys, on the playground, on doorknobs, towels, or by shaking hands
with someone who has a wart.
It is possible that children are more susceptible to the virus because
of their immune systems are not fully developed. Nail biting is an
activity that causes damage to the area around it, and increases the
risk of viral infection. Frequent handwashing is a good way of
preventing spread of the virus. Use lotion on the skin regularly to
prevent cracking.
Treatments such as the application of duct tape, clear nail polish or
salicylic acid directly to warts are some of the current remedies.
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Nappy rash is a red, irritating skin rash in the area which is covered by the nappy.
Nappy rash is a red, irritating skin rash in the area which is covered by the nappy.
Nappy rash is caused by urine and faeces sitting close to the skin for extended periods of time.
Almost all children will have at least one episode of nappy rash in their lives. It is very common and does not mean that you have not been caring for your child.Some parents report that their child's nappy rash is worse when they are teething, if they use disposable nappies or if they use cloth nappies, or if they use certain types of soaps or detergents when washing the nappies.
What is the treatment?
The nappy area should be kept clean and dry as much as possible. It is advisable to change nappies frequently. Some people find using cloth nappies better than disposables, for others it makes no difference. You will need to experiment to find out what suits your baby.
If using cloth nappies, ensure that all traces of detergent or soap are rinsed out of the nappies when washed. If soaked in a nappy soaking agent, the nappies should be well rinsed.
At each nappy change wash the buttocks and surrounding area with warm water using a soft cloth. Carefully pat dry and apply a barrier cream, such as lanolin or zinc and castor oil cream. 
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Measles, best known for its typical skin rash, is very rare, and a child who is properly vaccinated is extremely unlikely to contract the disease.
measles or rubeola ,highly contagious disease of young children, caused by a filterable virus and spread by droplet spray from the nose, mouth, and throat of individuals in the infective stage. This period begins 2 to 4 days before the appearance of the rash and lasts from 2 to 5 days thereafter. The first symptoms of measles, after an incubation period of 7 to 14 days, are fever, nasal discharge, and redness of the eyes. Characteristic white spots appear in the mouth, followed by a rash on the face that spreads to the rest of the body. The symptoms disappear in 4 to 7 days. One attack of measles confers lifelong immunity. However, it renders the patient susceptible to other more serious infections such as bronchial pneumonia and encephalitis. The measles virus has also been associated with subacute sclerosing panencephalitis (SSPE), which causes chronic brain disease in children 
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