Posts Tagged ‘skin’

Prickly Heat Rash

Prickly heat rash or miliaria rubra is the most common type of heat rash. In this form of heat rash, the sweat duct becomes red and inflamed, and may cause a ‘prickling’ or stinging sensation. This type of heat rash may also cause mild itching. There are three types of miliaria, which are classified according to where the sweat ducts are blocked.

§  Miliaria rubra. Occurring deeper in the outer layer of skin, miliaria rubra causes red bumps that are intensely itchy or prickly, giving rise to its common name, prickly heat rash. There is often little or no sweating in the affected areas. Adults can develop miliaria rubra shortly after they’re exposed to hot weather, but the rash more often appears after several months of exposure. Infants usually develop this type of heat rash between the first and third weeks of life.

§  Miliaria crystallina. The mildest form of heat rash, this affects the sweat ducts in the stratum corneum, the topmost layer of skin. Miliaria crystallina is marked by tiny, clear, superficial blisters and bumps (papules) that break easily but aren’t itchy or painful. It usually clears on its own in a few days but can come back if hot, humid weather persists. And though it’s most common in newborns, adults can develop it, too, especially if they’ve recently moved from a temperate climate to the tropics.

§  Miliaria profunda. A less common form of heat rash, miliaria profunda occurs mainly in adults who have had repeat bouts of miliaria rubra. It affects the dermis, a deeper layer of skin, and appears soon after exercise or any activity that causes sweating. The lesions are firm and flesh-colored, much like goose bumps. Though it’s not uncomfortable, miliaria profunda can cause a widespread lack of perspiration, leading to symptoms of heat exhaustion, such as dizziness, nausea and a rapid pulse.

The best treatment for any form of heat rash is to reduce sweating by staying in air-conditioned buildings or, when that’s not possible, using fans to circulate the air, wearing lightweight clothing made of fabrics that breathe and limiting physical activity. Once skin is cool, heat rash tends to clear quickly.

Occasionally, heat rash becomes infected with bacteria, causing inflamed and itchy pustules. This is especially common in children in diapers but shouldn’t be confused with diaper rash, which results from irritation to tender skin, not from blocked pores.  In hot weather, people with miliaria profunda are at risk of heat exhaustion, which can cause low blood pressure, nausea, headache and a rapid pulse. Untreated heat exhaustion can lead to heatstroke, a life-threatening condition.

Rash

A rash indicates an abnormal change in skin color or texture. Rashes are usually caused by skin irritation, which can have many causes. A rash is any bumps or spots on the skin. The rash can be red, skin-colored, or slightly lighter or darker than skin color. Prickly heat causes rash or blotches during hot weather or in a hot environment just like a heat rash.

Hives are red welts that appear to move around on the body. They differ in size and shape and are usually very itchy. The most common cause of hives is a viral infection. There is no treatment for the virus, and the hives may last for a few weeks. You can use antihistamine medication for the itching. Sometimes bacterial infections cause hives. These are treated with antibiotics. Sometimes hives can be a sign of an allergy. This is best determined by your health care provider.

Milia/miliaria are tiny white, clear or red bumps on the skin.  These usually occur on the face and chest. Usually the white or clear ones are seen in newborns. The red ones are also called heat rash or prickly heat.

Baby acne is caused by exposure to the mother’s adult hormones. Little white dots often seen on a newborn’s nose represent an abnormal amount of normal skin oil that is a result of these hormones. Acne usually occurs between 2 and 4 weeks of age, but may appear up to 4 months after birth and can last for 12 – 18 months.

Eczema is a condition of the skin in which areas are dry, red (or darker than normal skin color), and itchy. When it goes on for a long time the areas become thickened. It is often associated with asthma and allergies, although it can often occur without either of these. Eczema often runs in families.

Cradle cap causes greasy, scaling, crusty patches on the scalp that appear in a baby’s first 3 months. It usually goes away by itself, but some cases may require treatment with medication.

Erythema toxicum can cause flat red splotches. These splotches are usually with a white, pimple-like bump in the middle and appear in up to half of all babies. These blotches rarely appear after 5 days of age, are usually gone in 7 – 14 days, and are nothing to worry about.

Most baby rashes cause no harm and go away in time on their own.