Rash

A rash changes how your skin looks.

It can change your skin color. It might feel bumpy or dry. Some rashes feel warm or itchy. A rash can be in one spot. It can also cover your whole body.

Many things cause a rash. You might touch something that bugs your skin. You can also get a rash from food. Some people get them from the sun. Rashes can even come from bugs.

Doctors look at a rash to help you. They see if it is red or scaly. They check where it is on your body. They might ask about your job or family.

Some rashes look like small red dots. Others might look like white spots. Some can even look like a ring. Every rash is a little different.

There are many ways to treat a rash. Some use a cream to help. A doctor can help you feel better.

A rash is a change in your skin. It can change how the skin looks or feels. A rash might make the skin red, bumpy, or dry. It can also feel itchy, warm, or painful. Some rashes stay in one spot. Other rashes can cover your whole body.

Many different things cause a rash. You might have an allergy to food or certain metals. Some people get hives from insect stings. You can also get a rash from touching something that bugs your skin. Sunburn is another common cause. Even stress or anxiety can lead to a rash. Some rashes come from germs, like a fungal infection called ringworm.

Doctors use many clues to find the cause. They look at the shape and color of the rash. They check if the rash is symmetrical. This means it looks the same on both sides of your body. They also see where the rash is located. For example, measles often starts on the head and spreads down. A doctor might use a patch test to find out if you are allergic to something.

Treatment depends on the type of rash you have. Some people use a topical cream. This is a cream you rub on top of the skin. Doctors may suggest steroid creams to help. Many medicines are available without a prescription. A doctor can help you find the right way to feel better.

A rash is a change in the skin. It can change how the skin looks or feels. A rash might change the color or texture of your skin. It can make the skin itchy, warm, or bumpy. Some rashes feel dry, cracked, or even blistered. They can also be painful or swollen. A rash might stay in one small spot. Other rashes can cover your whole body.

Many different things can cause a rash. Some people have an allergy to food, dyes, or insect stings. You might react to metals like nickel or zinc. These reactions often cause hives. Other rashes come from touching an irritant. This could be poison ivy or even certain clothes. Sunburn and heat are also common causes. Even feeling anxious can lead to a rash. Some rashes come from germs, like a fungal infection called ringworm.

Doctors look for clues to find the cause. They look at the appearance of the skin. They check if the rash is symmetrical. This means it looks the same on both sides of your body. They also look at where the rash is located. For example, measles starts on the head and spreads downward. Chickenpox blisters often follow the hollows of the body. Some rashes, like syphilis, appear on the palms or soles of the feet. A doctor might use a patch test to find out what you are allergic to.

There are many specific types of skin conditions. Acne can cause bumps on the face, chest, or back. Eczema and psoriasis are other common skin diseases. Psoriasis often looks like white, scaly skin over red areas. Some rashes, like Lyme disease, can grow very large. A Lyme disease rash can reach 5 to 70 centimeters. Other rashes, like shingles, can be very painful. Even small things like warts can appear on the skin.

Treating a rash depends on what caused it. Most treatments are different for each specific condition. Some people use a topical cream, which is a medicine you rub on the skin. Steroid creams, like hydrocortisone, are often used to help. Many of these medicines are available over the counter in the United States. However, some steroid creams may not work well if they cannot soak into the skin. A doctor can help you find the right way to feel better.

A rash is a visible change in the skin's color, appearance, or texture. It can affect a single small area or cover the entire body. When a rash occurs, the skin might become itchy, warm, or bumpy. It can also feel dry, cracked, or blistered. Some people experience swelling or pain alongside these changes. Because so many different things cause rashes, they are very diverse in how they look and feel.

To understand a rash, doctors must perform a careful diagnosis. They look at the specific appearance of the skin lesions. For example, some rashes look like sandpaper, which is typical of scarlet fever. Others appear as plaques with silver scales, a sign of psoriasis. Doctors also examine the distribution, or where the rash is located on the body. Some rashes, like secondary syphilis, appear on the palms and soles of the feet. Others, like chickenpox, tend to follow the hollows of the body.

Symmetry is another important clue during a medical examination. A symmetrical rash looks the same on both sides of the body. In contrast, a condition like herpes zoster usually affects only one side. This helps doctors rule out certain diseases. They also consider the patient's history, such as their occupation or recent travel. A doctor might even order a patch test to identify specific allergens. This test helps determine if a substance caused an allergic reaction.

Many different triggers can cause these skin changes. Allergies to food, dyes, or insect stings often cause hives. You can also react to metals like nickel or zinc. Contact with an irritant, such as poison ivy or balsam of Peru, can cause allergic contact dermatitis. This can result in a red, itchy, or even leathery rash. Other causes include fungal infections like ringworm or skin diseases like acne. Even environmental factors like sun exposure or heat can lead to a rash.

Specific medical conditions produce very distinct types of rashes. Measles causes an erythematous, morbilliform, maculopapular rash. This means it is a red, spotted rash that starts at the head and spreads downward. Lyme disease produces a unique rash called erythema migrans. This circular or oval rash can expand to between 5 and 70 centimeters. It may have a central clearing or a darker center. It can feel warm, though it is usually not itchy or painful.

Other conditions affect specific parts of the body or have unique symptoms. Acne vulgaris often appears on the face, chest, and back. It presents as comedones, papules, or pustules. Pityriasis rosea often begins with one scaly spot before spreading across the chest and abdomen. Some rashes are quite painful, such as shingles or boils. Others, like croup or chickenpox, may come with a fever or sore throat. Even small, firm bumps called warts can form on the skin without itching.

Treatment for a rash depends entirely on its underlying cause. Doctors may recommend topical creams, which are medicines applied directly to the skin. Steroid creams, such as hydrocortisone, are common for many minor rashes. In the United States, many of these treatments are available over the counter. However, these creams have limitations. For instance, hydrocortisone may struggle to penetrate the skin through absorption. This can make it ineffective for anything except very mild cases.