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Doctor insights on: Bright Red Rash Legs

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Dr. Ward Dean
Board Certified, Anti-Aging Medicine
38 years in practice
809K people helped
1

1
What could a sudden bright red rash on legs be (starburst, half dollar sized) after starting Bactrim? MD says unrelated and may be strep infxn?

Dr. Ward Dean
Board Certified, Anti-Aging Medicine
38 years in practice
809K people helped
What could a sudden bright red rash on legs be (starburst, half dollar sized) after starting Bactrim? MD says unrelated and may be strep infxn?

Allergy to sulfa: You may be allergic to sulfamethoxazole, a component of Bactrim. I suggest discontinuing Bactrim to see if the rash goes away. ...Read more

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Dr. Steven Seres
Board Certified
16 years in practice
464K people helped
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Dr. Steven Seres
Board Certified
16 years in practice
464K people helped
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Dr. Cornelia Franz
1,060 doctors shared insights

Rash (Definition)

Most bumps and blotches on a newborn baby are harmless and clear up by themselves. By far the most common skin problem in infants is diaper rash. Diaper rash is an irritation of the skin caused by dampness, urine, or feces. Most babies who wear diapers will have some type of diaper rash. However, there are other skin disorders that can cause rashes. These are usually not serious unless ...Read more


Dr. Zachary Veres
Board Certified, Family Medicine
13 years in practice
15M people helped
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Dr. Steven Seres
Board Certified
16 years in practice
464K people helped
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Dr. Steven Seres
Board Certified
16 years in practice
464K people helped
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Dr. Reid Blackwelder
Board Certified, Family Medicine
32 years in practice
6M people helped
3

3
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.?

Dr. Reid Blackwelder
Board Certified, Family Medicine
32 years in practice
6M people helped
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

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Dr. Ellen Altenburg
Board Certified, Pediatrics
26 years in practice
1M people helped
4

4
My 14 month old daughter started a rash whith three red marks on back of right leg. In 24 hrs spread to chest back and arms a bum.....24hrs bright red?

Dr. Ellen Altenburg
Board Certified, Pediatrics
26 years in practice
1M people helped
My 14 month old daughter started a rash whith three red marks on back of right leg. In 24 hrs spread to chest back and arms a bum.....24hrs bright red?

Need exam: You can't diagnose the cause of a rash without actually examining the child. Could be insect bites, skin infection, contact dermatitis,hives or virus. I'd make an appointment with her pediatrician ...Read more

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Dr. Steven Seres
Board Certified
16 years in practice
464K people helped
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Dr. Reid Blackwelder
Board Certified, Family Medicine
32 years in practice
6M people helped
5

5
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?

Dr. Reid Blackwelder
Board Certified, Family Medicine
32 years in practice
6M people helped
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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Dr. Ibrahim Al-Sanouri
Board Certified, Allergy and Immunology
22 years in practice
109K people helped
6

6
My arms and legs are a bright red but not itchy rash. I am also experiencing chills with the red skin.

Dr. Ibrahim Al-Sanouri
Board Certified, Allergy and Immunology
22 years in practice
109K people helped
My arms and legs are a bright red but not itchy rash. I am also experiencing chills with the red skin.

Urgent: Please seek urgent medical advice as this might be a serious infection that needs to be treated at once. ...Read more

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Dr. Alexandrr Lakowsky
Board Certified, Internal Medicine
15 years in practice
4K people helped
7

7
I've been having some red rashes accompanied by a greenish color on my leg for about a week, and I think it's spreading.

Dr. Alexandrr Lakowsky
Board Certified, Internal Medicine
15 years in practice
4K people helped
I've been having some red rashes accompanied by a greenish color on my leg for about a week, and I think it's spreading.

Have it checked: This could be a number of things and hard to know what it is without looking at it. Most commonly, this could be reaction to something (like an allergy) or infection that may need to be treated. I suggest you see your doctor soon to have it checked out properly. ...Read more

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Dr. Tanya Russo
Board Certified, Pediatrics
20 years in practice
8M people helped
8

8
I fell down and had an abrasion on my leg. Now the wound is healed but there are red itchy rashes(dots) around it and spreading! What could it be?

Dr. Tanya Russo
Board Certified, Pediatrics
20 years in practice
8M people helped

Infection?: Spreading rashes after an injury to the skin are usually a symptom of infection with fungus or bacteria. ...Read more

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Dr. Brock Andersen
Board Certified, Dermatology
12 years in practice
90K people helped
9

9
I've just had a new tatoo done on my leg, and rashes are starting to develop, it's red, sore and painful, what cream should I use?

Dr. Brock Andersen
Board Certified, Dermatology
12 years in practice
90K people helped
I've just had a new tatoo done on my leg, and rashes are starting to develop, it's red, sore and painful, what cream should I use?

Rash in tattoo: See a dermatologist. You may have an infection from tattoo equipment or reaction related to the tattoo ink. ...Read more

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Dr. Powlin Manuel
Board Certified, Allergy and Immunology
46 years in practice
3M people helped
10

10
I have small, painful rashes on my back and legs. My eyes are red and I have swelling everywhere. What is happening?

Dr. Powlin Manuel
Board Certified, Allergy and Immunology
46 years in practice
3M people helped
I have small, painful rashes on my back and legs. My eyes are red and I have swelling everywhere. What is happening?

Insect allergy?: Good morning, painful rash on back and legs can be due to many causes. One patient developed such a rash after staying in a hotel; my diagnosis was bed-bug-allergy, as the rash was limited to the back of trunk, and back of legs, and the protected areas such as those covered by intimate clothing was not affected. Since your eyes are red and swelling everywhere other causes of need consideration. ...Read more

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Dr. John Chiu
2,461 doctors shared insights

Skin Rash (Definition)

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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Dr. Steven Seres
Board Certified,
16 years in practice
464K people helped
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