Top
20
Doctor insights on: Why Does An Allergic Reaction Turn Into A Rash

Share
1

1
Why does an allergic reaction turn into a rash?

Why does an allergic reaction turn into a rash?

Usually histamine: Histamine causes redness, itching, pain, swelling, the common skin manifestations of an "allergic reaction". ...Read more

See 1 more doctor answer
Dr. John Chiu
2,586 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


4

4
My wife seems to be having a bad allergic reaction. She has rashes all over her body and is itching badly. What is the best way to alleviate this?

My wife seems to be having a bad allergic reaction. She has rashes all over her body and is itching badly. What is the best way to alleviate this?

Stop the offending: cause if known. Also reasonable to take short acting antihistamines like Benadryl (diphenhydramine) or longer acting ones like Claritin or Zyrtec. If the rash is severe enough and/or the itching is not alleviated than over the counter steroid creams may be beneficial. Of course if symptoms do not improve or worsen a trip to the doctor may be in order for a definitive diagnosis and/or stronger prescriptions. ...Read more

See 1 more doctor answer
5

5
I smoked weed for the first time and i woke up in the morning with rashes on my chest and chest pain, is this normal? Is it an allergic reaction?

I smoked weed for the first time and i woke up in the morning with rashes on my chest and chest pain, is this normal? Is it an allergic reaction?

Probably: You have a great reason not to try that stuff again. Most of us are goofy enough without needing cannabis. If the stuff does become legal and you want to resume, remember that there may have been something else in that particular batch that "wasn't supposed to be there." experiment again only at your own risk. ...Read more

See 1 more doctor answer
6

6
Can my child get a non-itchy rash as an allergic reaction to her body wash? I noticed since changing her wash, she now has flat red rashes on her.

Can my child get a non-itchy rash as an allergic reaction to her body wash? I noticed since changing her wash, she now has flat red rashes on her.

Yes , it is possible: Although It is not common to get an allergic rash as a reaction to the body wash, but it is possible. She should be checked by her pediatrician to be sure that it is an allergic rash and not a something else. Changing the body wash in addition to use of a mild antihistaminic medicine would solve this problem ...Read more

9

9
Got an allergic reaction from unknown source on my entire body, tried Benadryl (diphenhydramine) , not helping. What can I try using? Just itching all over, no rashes,hives.

Got an allergic reaction from unknown source on my entire body, tried Benadryl (diphenhydramine) , not helping. What can I try using? Just itching all over, no rashes,hives.

Dry skin?: Dry skin by far is the most common cause for itching without a rash.Try applying moisturizer all over within 3 mins after bathing while avoiding scented or antibacterial soap. If problem continues , see allergist or dermatologist since there are many potential causes for itching. ...Read more

10

10
My 9 month old was prescribed amoxicillian for an ear infection. After three days, little red rashes are on his body. Is it an allergic reaction?

My 9 month old was prescribed amoxicillian for an ear infection. After three days, little red rashes are on his body. Is it an allergic reaction?

Difficult to answer: Most commonly, the rash is associated with Amoxicillin is not a true allergy, but it is difficult to say without seeing the rash. I would recommend taking your infant to his pediatrician to be sure. ...Read more

See 1 more doctor answer
11

11
7yo has rashes on both upper arms. Raised red bumps. Itchy. Doesn't look like hives. Allergic reaction?

7yo has rashes on both upper arms. Raised red bumps. Itchy. Doesn't look like hives. Allergic reaction?

Skin rash: The differential is very large. Could be sun exposure. Could be contact dermatitis. I would follow up with your family physician or dermatologist and give a more detailed rendering. When did it happen? Was the child taking any medication at the time? Any travel history? Use of new detergents or change in clothes? Have a great day. ...Read more

13

13
How long does an allergic reaction rash from echinacea last?

A few days: Rashes from something you ingest typically last for just a few days or less. The bigger question is what really caused the rash. People break out in rashes from time to time, and it's just human nature to blame the rash on something we ate in the last few hours. If the rash is continuing for more than a week, it probably has nothing to do with the echinacea; you should see your pcp to check it out. ...Read more

14

14
How do I tell what is causing my allergic reaction rash?

How do I tell what is causing my allergic reaction rash?

Timing: It depends on the timing. The contact with the allergens, either through skin or oral, usually happens days or weeks ago. Person's recall history is crucial. Tests are unreliable or not available. ...Read more

See 1 more doctor answer
15

15
How serious is a rash with a possible allergic reaction?

How serious is a rash with a possible allergic reaction?

Allergic Rashes: There are different types of rashes seen with allergic reactions. There are rashes from contact to an allergan. These can range from just a few small bumps in the area of contact, such as being allergic to nickel in a ring. Another contact allergy poison ivy can progressively spread. Food allergies may start with hives but can quickly progress to dangerous swelling of lips, throat for some. ...Read more

16

16
How do you know you what type of allergic reaction rash you got?

How do you know you what type of allergic reaction rash you got?

Rash trigger: Dear CDean, It would depend on what triggered the rash and what it looks like and your symptoms. Best to have a health care professional see the rash to determine the type. ...Read more

17

17
How long does it usually take an allergic reaction rash to go away?

How long does it usually take an allergic reaction rash to go away?

Variable: Hives or urticaria may wax and wane then resolve within a day or 2 after ingestion or contact with a food allergen. However, poison ivy or nickel allergic contact dermatitis may take 4-6 weeks to eventually resolve. The time to resolution is also impacted by what medications are taken such as oral corticosteroids such as prednisone, which can decrease the time significantly. ...Read more

18

18
How can you tell the difference between a rash or an allergic reaction?

How can you tell the difference between a rash or an allergic reaction?

Rash vs allergy: Reactions to foods, medications, insect (bee) stings often are generalized (all over), and usually are hives. Viruses and bacteria can trigger rashes that are typical for the infection (for ex., scarlet fever), but also hives. Trouble comes when on medications for an infection, and a rash or hive breaks out. Seek an experienced provider, allergist or dermatologist. ...Read more

19

19
How long can a rash or another allergic reaction from food usually last?

How long can a rash or another allergic reaction from food usually last?

Depends on the food: Allergic reactions are present as long as the allergen that triggers it is also present. For food, it depends on how much was eaten and if it is eliminated from the body. ...Read more

See 1 more doctor answer
20

20
How can you tell if a rash is caused by an allergic reaction or something else?

How can you tell if a rash is caused by an allergic reaction or something else?

Can't: There's an old saying in dermatology: you can't diagnosis a rash over the phone. I even get confused after seeing some rashes. Generally, allergic rashes are welts but some allergic rashes are small red dots. Best to see your dermatologist. ...Read more

See 1 more doctor answer
Dr. John Chiu
1,033 doctors shared insights

Allergic Reaction (Definition)

Sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more


Dr. John Chiu
2,622 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