Posts for tag: Rash
Wondering when a rash is a cause for concern?
We’re all going to deal with a rash at some point, and while the good news is that many of them can be treated from the comfort of your own home, sometimes you will need to turn to a dermatologist for medication. Here are the causes of a rash,
One of the most common fungal infections that result in a rash is ringworm. Fungal infections can also affect the nails and hair. Yeast infections caused by the candida fungus can also result in rashes of the mouth, groin, or vagina. Less common fungal infections may result in those with compromised immune systems (e.g., patients who have HIV).
Minor fungal infections may be treated with over-the-counter anti-fungal creams or ointments. A dermatologist should treat more severe or persistent fungal infections.
The most common virus to produce a rash is the herpes simplex virus, both type 1 and type 2. Type 1 usually causes cold sores of the lips and nose, while type 2 leads to sores on the genitals. Those with an HSV flare-up may develop a tender rash on the palms. Chickenpox and shingles (caused by the herpes zoster virus) also result in itching, burning, and painful rashes.
Epstein-Barr virus, best known as mononucleosis or “mono,” can also lead to a mild rash that appears within a few days of being infected. If you develop a rash, a sore throat, swollen lymph nodes, and a fever, you should see a doctor.
Staphylococcus (e.g., folliculitis; cellulitis; impetigo) and streptococcus (e.g., strep throat; scarlet fever) are two common bacterial infections that lead to a rash. Sometimes Lyme disease is characterized by a bull’s eye-like rash surrounding the tick bite.
Parasites that cause a rash include lice and scabies, which can be passed from person to person. Lice most commonly affect the scalp, while scabies can cause an itchy, pimple-like rash that usually appears on the armpits, wrists, elbows, beltline, and buttocks.
Noninfectious rashes are also caused by drugs, eczema (e.g., atopic dermatitis), allergic dermatitis, autoimmune disorders (e.g., lupus), and food allergies.
It isn’t easy to tell what’s causing your rash, but if you are dealing with new, worsening, or severe symptoms or the rash is spreading, it’s always good to turn to your dermatologist for treatment.
What causes rashes?
There are so many reasons why a rash may surface. Rashes may be the result of a bacterial, fungal, or viral infection, or it could be caused by an allergy. Common causes of a rash include,
- Atopic or contact dermatitis
- Pityriasis rosea
- Insect bites and stings
- Poison ivy, oak, or sumac
- Diaper rash
- Lichen planus
- Allergy to a drug/medication
How do I treat a rash?
- Using only gentle cleansers and soaps that do not contain harsh chemicals or fragrances
- Avoiding hot water and only using lukewarm or cold water
- Being gentle when cleansing, bathing, and handling the skin
- Not covering the rash (let it breathe)
- Using only unscented products
- Applying calamine lotion to control itching
- Using hydrocortisone cream to reduce itchiness, swelling, and redness
- Not scratching the rash, as this can lead to an infection
When should I see a dermatologist about my rash?
- The rash is widespread and takes over most of your body (this could be a sign of an allergic reaction, which requires immediate attention)
- The rash is spreading quickly and suddenly
- Your rash is accompanied by a fever (this is often a sign of serious infection)
- The rash is painful or contains blisters
- There are signs of infection such as oozing, crusting, or skin that’s warm to the touch
You’re Allergic to the Oil from these Plants
Poison ivy secretes an oil known as urushiol. When a person comes in contact with the oils from these plants this causes an allergic reaction. You may notice a rash that forms in a straight line (as if you brushed against a poison ivy leaf). If you suspect that you’ve come into contact with poison ivy, sumac, or oak, it’s important to wash your clothes immediately and to take a shower to prevent the oils from spreading further.
You Can Usually Treat It Yourself
While the rash can be unpleasant, symptoms should go away within 2-3 weeks. Since the rash can be quite itchy and uncomfortable, here are some ways to ease your symptoms:
- Take cool, oatmeal baths to alleviate inflammation and itching
- Apply calamine lotions to the skin to temporarily alleviate itching
- Steroid creams (aka: cortisone cream) may also alleviate redness and inflammation
- Apply cold compresses to the area when symptoms flare-up
- Whatever you do, do not scratch your rash (this can lead to an infection)
Some people have severe allergic reactions when they come into contact with poison ivy, sumac, or oak. You must call your dermatologist as soon as possible if:
- Pus develops on the rash
- You also have a fever over 100 F
- You experience severe itching
- The rash keeps spreading
- You aren’t sure whether the rash is caused by poison ivy, oak, or sumac
- The rash spreads to the mouth or the eyes
- Symptoms don’t improve within a week