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Doctor insights on: Itchy Rash On The Back Of My Leg

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I have a bright red (and itchy!) rash on the back of both my legs, between my butt and knee. It looks like small bug bite like bumps. Not spreading.?

I have a bright red (and itchy!) rash on the back of both my legs, between my butt and knee. It looks like small bug bite like bumps. Not spreading.?

Many causes: Rashes are challenging even when the doctor can see them, so even harder in this forum. Small red bumps on both legs make me think of reactions to clothes, or something in contact with that area on both sides. Bites can do it. It could be heat rash, a reaction of the skin to warmth and occlusion from pressure. Some drug reactions can do that as can conditions like eczema and psoriasis. ...Read more

Dr. John Chiu
2,673 doctors shared insights

Rash (Definition)

A skin rash is a symptom in which a person has changes on part or all of his skin, such as color changes, bumps, blisters, oozing, peeling, ...Read more


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Many bright red and itchy rash on the back of both my legs, between butt and knee. It looks like small bug bite like bumps smeared in a line. Nospread?

Many bright red and itchy rash on the back of both my legs, between butt and knee. It looks like small bug bite like bumps smeared in a line. Nospread?

Many causes: Rashes are challenging even when the doctor can see them, so even harder in this forum. Small red bumps on both legs make me think of reactions to clothes, or something in contact with that area on both sides. Bites can do it. It could be heat rash, a reaction of the skin to warmth and occlusion from pressure. Some drug reactions can do that as can conditions like eczema and psoriasis. ...Read more

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Almost a year ago. I got these 2 itchy red rashes on the back of my legs. My doctor said it could be from stress. What could be the cause of it?

Almost a year ago. I got these 2 itchy red rashes on the back of my legs. My doctor said it could be from stress. What could be the cause of it?

RED ITCHY RASHES: SORRY, STRESS WILL NOT CAUSE THESE.
THINK OF INSECT BITES, MEDICATIONS, POISON IVY, ETC
DO YOU HAVE A CAT OR A DOG?
HOW LONG HAVE THEY BEEN THERE? ...Read more

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Itchy burning rash on the back of my leg and upper arm, cause?

Itchy burning rash on the back of my leg and upper arm, cause?

Many possibilities: There are many things that could cause the skin to itch. Several types of inflammatory conditions of the skin, allergic reactions, sun exposure, insect bites, and sometimes bacterial, viral or fungal infections can cause rashes on the skin. Have it evaluated by a professional and get the appropriate treatment. ...Read more

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I have itchy skin and it's very cold out here i been experiencing itchy rash on my back legs and arms I put lotion on but what to use otc?

I have itchy skin and it's very cold out here i been experiencing itchy rash on my back legs and arms I put lotion on but what to use otc?

Cold weather : Can dry our skin and cause itching. Key is to avoid washing with hot water. Use good moisturizing creams, lotions, skin cleansers eg cetaphil, moisturel, aquaphor , eucerin, neutrogena, aveeno (oatmeal) etc. ...Read more

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7 year old developed itchy rash first on back of neck later in day it spread to arms, stomach and legs no other symptoms, what is it and what to do?

7 year old developed itchy rash first on back of neck later in day it spread to arms, stomach and legs no other symptoms, what is it and what to do?

Hard to say: If the rash is moving from a local to a general distribution it is unlikely a simple contact dermatitis like poison ivy. Generalized rashes can be secondary to an infection (virus or bacteria) a food reaction or bug bites. Without examining the rash it is hard to speculate on a cause or specific treatment. If it itches, Benadryl can be given for comfort. ...Read more

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3yr old Raised itchy rash over back of neck arms and legs only. No fever. Just recovered from general virus. What could it be? Exclude from kindy?

3yr old Raised itchy rash over back of neck arms and legs only. No fever. Just recovered from general virus. What could it be? Exclude from kindy?

Mgt: From your description there may be an allergic reaction. I would advise letting your PCP know and a dose of over the counter children's anti histamine such as Claritin (loratadine) may be used. It may be related to the virus or an allergic trigger.
Your PCP will obtain a history including whether there were new foods, medications, lotions etc. ...Read more

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I have small itchy bumps like rashes on my back, legs, stomache&now starting on my arms. They begin as a little redspot and then grow into a rash.

I have small itchy bumps like rashes on my back, legs, stomache&now starting on my arms. They begin as a little redspot and then grow into a rash.

Lots of causes: For your rash. Commonly, allergic rash present as itchy
bumps. Yeast, bacteria or ringworm can aslo occur. Shingles are usually localized and painful bumps. Less common are Lupus or drug reaction. Please consult dermatologist. Please email or call Healthtap (Call us at 650-376-6010) to schedule a video-consult with a skin specialist. ...Read more

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I have an extremely itchy rash on the inside of my thigh and back of thigh. It's not red. Slightly pinkish. A little raised but not much?

I have an extremely itchy rash on the inside of my thigh and back of thigh. It's not red. Slightly pinkish. A little raised but not much?

Rash: An accurate diagnosis for the cause of a rash will require a physical by an experienced physician or dermatologist. At times a biopsy will be needed. ...Read more

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I have an itchy rash all over my torso neck back and now has spread to my legs?

Need a picture: Rashes are tough to diagnose with just limited description. Often even with pictures and biopsies rashes can go undiagnosed. It is important to see the rash and get a thorough history including new contacts, foods and medications taken as well as pattern of spread to get an accurate diagnosis. I would get seen if this rash is spreading and causing discomfort. ...Read more

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I have an itchy rash for 3wks that I got from a body wrap. It started on my thighs and now has spread to my legs, lower back, and arms. Please help.

I have an itchy rash for 3wks that I got from a body wrap. It started on my thighs and now has spread to my legs, lower back, and arms. Please help.

Use steroid cream: It seems you have an acute case of contact dermatitis and may need to see your doctor asap as it is spreading
meanwhile take over the counter Benadryl (diphenhydramine) to control the itching and use 1%hydrocortisone cream locally till you see your doctor
you may need stronger steroid cream and/or oral or injecteble steroids. ...Read more

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I have an itchy rash which started after a body wrap. It started on my thighs and now has spread to my legs, lower back and arms. It's been 3 weeks.?

I have an itchy rash which started after a body wrap. It started on my thighs and now has spread to my legs, lower back and arms. It's been 3 weeks.?

See your doctor: You have huge rash and it is spreading, you should see your doctor or a dermatologist asap to find the diagnosis and proper treatment as it has been there for three weeks. ...Read more

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I am experiencing dry skin, very itchy rash. On sides under boobs, back and inside of top of my legs. It gets worse in the winter. Red patchy circles?

I am experiencing dry skin, very itchy rash. On sides under boobs, back and inside of top of my legs. It gets worse in the winter. Red patchy circles?

Moisturizer: These are likely what is called winter rash due to dry skin. Try applying a moisturizer on your skin within 3 minutes after bathing (daily bathing is encouraged). Avoid scented or anti-bacterial soap. The red patchy circles however are not usually found in people with just dry skin. You may need to consult a dermatologist. ...Read more

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Brown itchy rash on lower abdomen, lower back and tops of legs starts off pinkish becomes extremely itchy then turns brown?

Brown itchy rash on lower abdomen, lower back and tops of legs starts off pinkish becomes extremely itchy then turns brown?

Rash: A rash is best diagnosed and treated when it is visualized by a doctor, who can then make an appropriate recommendation. If the itch is driving you crazy, try topical Hydrocortisone cream, an oral antihistamine to calm down itch, and cool showers or baths until you can see the doctor as soon as possible. ...Read more

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After I drink several glasses of red wine, my right calf swells up, my leg aches, and I get an itchy rash behind my knee. What's going on?

Reaction to sulfites: Is possible. Sometimes, more expensive red wines can contain sulfites. I don't know why your left calf will be spared though. Stick with cheap white wine. ...Read more

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I have a non itchy rash all over body, mainly arms and legs a little on my back and stomach, should I seek medical attention?

Drug Eruption: Drug eruptions can mimic a wide range of dermatoses. The morphologies are myriad and include morbilliform, urticarial, papulosquamous, pustular, and bullous. Medications can also cause pruritus and dysesthesia without an obvious eruption. A drug-induced reaction should be considered in any patient who is taking medications and who suddenly develops a symmetric cutaneous eruption. ...Read more

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Urgent! Im 31 weeks pregnant and I developed an itchy rash on my belly and its spreading to my lower back and my legs. Should i goto the er?

Urgent! Im 31 weeks pregnant and I developed an itchy rash on my belly and its spreading to my lower back and my legs. Should i goto the er?

PUPPP: Pruritic urticarial papules and plaques of pregnancy. Very itchy rash (pruritic) begins in stretch marks on belly with small, red wheals that grow together and over several days, the rash spreads to thighs, arms, & buttocks. The condition is harmless to mother & baby, but can be very annoying. It lasts about 6 weeks and resolves spontaneously 1-2 weeks after delivery. Go to OB for treatment. ...Read more

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What could cause extreme itchy rash in pubic area all of a sudden? Also, have random spots on stomach, arms, legs, back and buttocks. No new detergent

What could cause extreme itchy rash in pubic area all of a sudden? Also, have random spots on stomach, arms, legs, back and buttocks. No new detergent

Many: Contact allergy, bug bites, scabies- just to mention a few. If this has been going on for a while, you should consult your doctor. ...Read more

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My dad has had an itchy rash on his arms & legs for several months . He got a cortizone (hydrocortisone) shot, it cleared up & then came back. What could cause this he scratches till there are sores.

My dad has had an itchy rash on his arms & legs for several months . He got a cortizone (hydrocortisone) shot, it cleared up & then came back. What could cause this he scratches till there are sores.

Eczema or contact : Dermatitis are the two most common causes of localized itchy rash. But dr. Fisher is right: a picture is worth a 1000 words. If he wants a diagnosis along with his cortisone shot see a dermatologist or an allergist. The photo is of contact dermatitis. ...Read more

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I have a non itchy rash all over body, on my arms. Legs, stomach, back chest and neck. I have been prescribed a steroid cream and antihistamines. I've been using these for two weeks but the rash has got worse. What could this be?

I have a non itchy rash all over body, on my arms. Legs, stomach, back chest and neck. I have been prescribed a steroid cream and antihistamines. I've been using these for two weeks but the rash has got worse. What could this be?

Needs re-evaluation: Not possible to diagnose without at least a picture, you need to see your doctor again who would refer you to a dermatologist. Please hold the steroid cream for now, it could be a fungal rash or something else, good luck ...Read more

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Sudden appearance of red itchy rash behind my knee, swelling and spreading. I scratched my eyelid and got four bumps there too so its spreading?

Sudden appearance of red itchy rash behind my knee, swelling and spreading. I scratched my eyelid and got four bumps there too so its spreading?

Allergies: Patients with allergies can develop red and itchy skin around the eyes and on the eyelids from allergies. Behind the knees and on the inside part of the elbow too. This skin condition is called allergic dermatitis or allergic eczema. You can use a hypoallergenic cream/lotion: cetaphil or lubriderm and consider contacting your medical doctor about taking allergy pills-such as Claritin (loratadine) or allegra. ...Read more

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Red very itchy rash dr aid she didn't know what it is all over back chest inner thigh neck arms shoulders had for two days bad itchy skin

Many possibilities: There are many things that could cause the skin to itch. Several types of inflammatory conditions of the skin, allergic reactions, and sometimes bacterial, viral or fungal infections can cause rashes on the skin. Insect bites can also be the cause of a rash on the skin. Have it evaluated by a professional and get the appropriate treatment. ...Read more

Dr. Cornelia Franz
1,059 doctors shared insights

Rash (Definition)

A rash is a change to skin condition which can affect color, appearance, or texture. It may or may not ...Read more


Dr. Doanh Nguyen, md, faaaai
649 doctors shared insights

Itchy Rash (Definition)

Most itchy rashes are called eczema or dermatitis. Both are due to ...Read more