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Doctor insights on: What Does A Rash On One Arm Mean

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I have a thick rash only on my left arm pit. What should I do? The rash is not one big rash. It is spred out in 4 different rashes & bright red.

I have a thick rash only on my left arm pit. What should I do? The rash is not one big rash. It is spred out in 4 different rashes & bright red.

Get the diagnosis: There are many types and causes of skin rashes. 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.

Dr. John Chiu
2,641 Doctors shared insights

Skin 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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Last night I ate 2 pcs of chicken and develop some rashes in my arms and legs, can I consider it as one of d foods tat im allergic with?

Last night I ate 2 pcs of chicken and develop some rashes in my arms and legs, can I consider it as one of d foods tat im allergic with?

Not yet: Symptoms such as rash after exposure to something like food may be due to an allergy, but there are multiple things, both allergic and non allergic, that can cause a rash. Food allergy is just one and can be serious if that is the cause. I recommend seeing a board certified allergist for an evaluation and testing.

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I'm currently on the Accutane, and one day I woke up with rashes on my face and both arms. Did Accutane cause rashes? If yes, how do I get rid of it?

I'm currently on the Accutane, and one day I woke up with rashes on my face and both arms. Did Accutane cause rashes? If yes, how do I get rid of it?

It is a side effect: Your rash can be caused by acutane. It is important that you avoid irritants such as sun during this time and stay moisturized. You should also show your rash to your current prescribing doctor.

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Plan b one step pill and hives related? I took the Plan B pill 2 almost 3 weeks ago and I've started to get hives or rashes on my stomach, arms, legs, back and neck. It weird because I had no other side effects. But I was wondering if it could be related

Plan b one step pill and hives related? I took the Plan B pill 2 almost 3 weeks ago and I've started to get hives or rashes on my stomach, arms, legs, back and neck. It weird because I had no other side effects. But I was wondering if it could be related

The: The odds of you having an allergic reaction from a Plan B taken three weeks ago are highly unlikely. Even if this was the case, there is no treatment aside from over the counter Benadryl (diphenhydramine) for itching. Consider other potential allergens like new products, lotions, or soaps. Good luck.

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I have several heart shaped rashes on my arms and one on my stomach. I've tried all kinds of ringworm creams assuming that's what it is. Left scars?

I have several heart shaped rashes on my arms and one on my stomach. I've tried all kinds of ringworm creams assuming that's what it is. Left scars?

Hard to say: A common truism about treatment is when appropriate measures don't fix a problem the diagnosis is likely wrong. Skin rashes can represent infections, local reactions, allergies or systemic illness. Diagnosis is often easy when seen by a trained observer. If your treatment for ringworm isn't working it is likely not ringworm. To find out what it is and treatment options will need a visit.

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I had a rash on one leg then it moved to the other and now it's on my arms? What is this? Is it contagious? And it itches

I had a rash on one leg then it moved to the other and now it's on my arms? What is this? Is it contagious? And it itches

Dermatitis / Scabies: You should visit a dermatologist for proper diagnosis. In the meantime take an antihistamine for the itching. Scabies are caused by tiny mites that burrow under the skin and spreads like a rash. Dermatitis is a skin inflammation characterized by red rash, dry and itchy skin.

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I have a rash on one of my arms and I've had it for 2 days. Its a bunch of small red bumps and it feels like its on fire when I itch it.

I have a rash on one of my arms and I've had it for 2 days. Its a bunch of small red bumps and it feels like its on fire when I itch it.

Red vesicular rash: 18 year old with painful burning vesicles on arm. Get a full medical history and in person physical exam ASAP. You can try a consult in your area as well. If the rash is itchy (pruritic) and painful you need to give more history. The differential is large and it could be anything from zoster to contact dermatitis to chiggers or a reaction to insect bites, bedbugs, or scabies. A picture=1k words.

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What does it mean when u have a rash in your arm & leg?

What does it mean when u have a rash in your arm & leg?

Rash: A rash that comes and goes can have many causes, try to see if you can correlate with anything you are eating or wearing or washing with. Persistent rashes are most commonly due to chronic conditions best diagnosed by your doctor or a dermatologist.

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Hi I have spots on one forearm like a rash, and I don't know what's caused it. It's only on the one arm, no where else. What could it be?

Rash: This can't be diagnosed with the information that is available. A history, physical examination & other studies may be needed to determine cause/causes.

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What does a spotty red rash on my arm mean? The rash has small red spots and is bumpy.

What does a spotty red rash on my arm mean? The rash has small red spots and is bumpy.

Many things: A common condition is keratosis pilaris (kp). Small reddish bumps appear on the back of the arms and sometimes the front of the thighs. It is very common and not dangerous. If you are unsure, please see a dermatologist.

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I have one small itchy rash on my arm it's the only rash I have and I don't know what it is. Do you have any idea?

I have one small itchy rash on my arm it's the only rash I have and I don't know what it is. Do you have any idea?

Rash: Hello and welcome to HealthTap:) If you can share a picture; or show it to me via virtual consult; it would be very helpful, that way I can confirm the type of lesion. Thank you Take care!

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I continually get a sort of rash on only one arm and only on the bicep. It consists of lots of small red dots that dry up. It's only ever on one arm.

I continually get a sort of rash on only one arm and only on the bicep. It consists of lots of small red dots that dry up. It's only ever on one arm.

Eczema/dermatitis: A rash that is itchy and scaly is possibly eczema or ringworm (not a real worm, but a name for a fungal infection). Rashes that come and go when it is in contact with something like a watch, rubber band/hair tie, etc can be contact dermatitis, which is due to irritated skin. Eczema and dermatitis can be treated with over the counter hydrocortisone cream.

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What could causea large red armpit rash under only one arm for over3 wks?

What could causea large red armpit rash under only one arm for over3 wks?

Several: It is possible to have an infection, fungal or bacterial. You could have an allergic reaction or just a severe irritation to shaving. Some dermatitis can start in one location or be isolated to one area. If fever, pain, or drainage or weeping fluid, see ur dr. If not can try an anti fungal powder to keep dry or mild steroid cream for relief of itch, irritation.

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One red circular rash on arm that flares up at least twice a year in same spot warm and itchy. When not inflamed, there's always a light brown spot.

One red circular rash on arm that flares up at least twice a year in same spot warm and itchy. When not inflamed, there's always a light brown spot.

See Your Doctor: Your rash suggests a condition called Cutaneous Mastocytosis; excess mastocyte cells accumulate usually in skin & release histamine; causing itching, hives, & more. Can occur as single or multiple lesions, involved skin is darker in color. Stroking or other mechanical trauma to skin can cause symptoms to flare-up. Occurs in children & ages 30-49 yrs. See doctor for correct diagnosis & treatment.

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Weird rash on my left forearm and neck. Noticed one rash on my arm, just got home and noticed my left arm is covered and neck. In the shape of a flower?

Weird rash on my left forearm and neck. Noticed one rash on my arm, just got home and noticed my left arm is covered and neck. In the shape of a flower?

Rash: It is nearly impossible to tell you what rash is without being able to see and examine it. It is best to be seen by a doctor who can diagnose it and prescribe treatment if necessary. As this is spreading I would seek care at an urgent care center today.

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