what is the medical term for a prolonged allergic reaction (rash) that is brought on by a reaction to a virus?
358026
It could be Herpes zoster, but check webmd.com for better answers.
796511
You are not mentioning where the rash is located, so I have\nto guess that it is located from the neck up....\nIf it started like a mosquito bite and got bigger and your\nglands are swollen you have an infection going on.\nSuggestion: See a doctor.
725534
Yes you can take blood tests. You may have to get a referal from your regular doctor, but you should see a allergist. They take little samples of lots of foods and other things and prick it into your arms (both arms) and which evers gets swollen and itchy after 10-15 minutes, you are allergic to. It is very cool, i have gotten it down twice.
1078211
Rashes are a common allergic reaction to antibiotics.  You can develop a drug allergy at any time, even if you've taken the drug before with no reaction.  You may be allergic to penicillin.  Or then it's a reaction to something else.
903954
You should try to find our what caused the rash. But for immediate relief, use calamine lotion, and have a anit histamine. If it does not settle you should see your doctor.\n\nGood luck
214173
In simplistic terms- Allergies are caused by the body's natural immune response to an outside stimulus.The immune system attacks a "foreign body" that enters your system (virus, bacteria, etc.) This is how it protects you from disease. Once the body has experienced this invasion, it manufactures antibodies that can easily attack (attach) to that specific foreign body and are always in the waiting to attack their return. This explains why once you have Chicken Pox you're unlikely to get it again and how vaccines work. This is great if the foreign body is dangerous but in regards to allergies, the immune system is somewhat overactive and is actually attacking a substance that isn't usually harmful.\nSome theories state that allergies are increasing due to our cleanliness (antibacteria soaps, antibiotics). It's kind of like our immune system is looking for something to do.
909376
WHAT IS URTICARIA?\n\n\n\nUrticaria is an itchy rash or skin eruption, which may occur anywhere on the body. It is usually temporary, disappearing within 24 to 48 hours. The rash has red weals (hard, raised patches of skin) and is usually itchy.\n\nUrticaria is often due to an allergic reaction to drugs, food or preservatives, but may also be due to fever, heat, exercise or physical pressure. Often the cause is not identified. Urticaria may also be caused by infections, such as hepatitis or even a cold.\n\nDermographism is a physical urticaria where firm stroking of the skin produces a red line which swells and becomes surrounded by a red flush of the nearby skin. There can be a weal down the line of the stroke. Dermographism literally means ‘writing on the skin’.\n\nWhat can you do to help?\nIf you know what causes the urticaria, avoid it. If aspirin precipitates urticaria it is important to see a doctor before using any other non-steroidal anti-inflammatory (NSAID) medicine.\n\nA tepid shower may be soothing. However, heat may make the itch worse. You should also avoid tight clothing as the pressure may worsen the weals and the itch. If the urticaria does not respond to an antihistamine, see your doctor.\n\nWhen should you seek medical advice?\nYou should seek medical advice if:\n\nurticaria occurs in a child under 12 years old; \nit lasts longer than 24 to 48 hours; \nit occurs more often than just occasionally; \nit covers a large area of your body; \nyou also experience fever or general unwellness; or \nthere is marked swelling, especially if your face, eyes, lips or tongue are involved. In this case seek medical advice urgently.
107826
Eczema is a condition not terribly unlike an allergy.  It's a response to something that irritates and it's also called atopic dermatitis.\n\nPsoriasis is a condition in which the skin "turns over" too fast--in other words, new cells grow before the old ones are ready to be shed.
916443
Heat rash or some sort of allergy...:
28988
Yes.  Reactions might include sneezing, stomach cramps, diarreha, vomiting, nausea, itchy mouth or tongue or lips, rash or itching, wheezing, difficulty breathing, runny eyes or nose, etc.
202439
Usually it means a low platelet disorder.  It also occurs during disseminate coagulation disorders that are part of very serious diseases like menigococcal meningitis.  Usually, the rash should be evaluated by a doctor asap.  If it is associated with high fever, headache, neck ache and other systemic signs of illness, one needs to go to the ER asap.
85022
You didn't say how old she is.  Children can get viral syndromes which cause a red rash.  Roseola is one they get, in which they may have a fever and be a little ill, then often the fever drops, and they break out in a red rash.  It is contagious to them, but relatively harmless, nothing special to do for it.  Of course measles causes a red rash.  They will be sick for a few days before they break out.  We don't see it much, with the vaccine being given to most.  They will get pretty sick with measles.  You just keep their skin clean so they don't get secondary infection, and give them a liquid diet, something they can hold down.  If they get worse, they need to see a doctor, as they could have secondary pneumonia, or even measles encephalitis, which is a rare complication.  I suppose you might know what hives looks like.  Hives is big splotches of elevated reddish "wheals", that usually itch.  It is usually an allergic reaction to something, and we usually can't tell what.  We just treat it with benadryl and steroids and it gets better.  These are the most common things.  Of course you can get a rash with an allergic reaction to something, such as to an antibiotic.  There are more rare types of skin outbreak, like Stevens-Johnson syndrome.  If the skin starts breaking down and looking really "angry", it could be that.  They usually get that as an allergic reaction to some drug, and it requires high dose steroids to combat.  Hope this helps.  It probably is just a mild virus like Roseola, and will go away on its own. If it is bad or gets worse, have her seen in ER.
655371
I think that the correct word you are looking for is IMMUNOGEN: "any substance or organism that provokes an immune response (produces immunity) when introduced into the body"\n\nNot all immunogens are antigens (which means "substance capable of raising antibodies against it") nor allergens ("responsible of causing allergy, a particular kind of immune response.")
467595
Lupus and allergies are two different types of Hypersensitivity reactions.  A hypersensitivity reaction is when the immune response is detrimental to the host.  Allergies are Type I Hypersensitivity.  These occur immediately and mostly involved premade immune components, such as IgE, histamine, and basophils.  Type I Hypersensitivity is also called Anaphylaxis  Lupus is Type III Hypersensitivity.  This involves immune complexes.  Basically, antibodies bind antigens in large complexes and then are deposited in areas where they shouldn't be, like post-capillary venules and joints.\n\nThere are two other types of Hypersensitivity reactions, Type II, which is mediated by antibodies alone and causes diseases like anemia, and Type IV, which is Delayed Type Hypersensitivity and is mediated by cells like macrophages.  When a person is tested for TB, the resulting immune response is dude to Type IV Hypersensitivity.
968262
its most likely an allergic reaction , the cough and the itch
568055
It depends, where is the rash, and what does it look like? Could it be the side effects of the medication you are taking? Have you consulted your doctor?
244122
It is not the virus which causes the symptoms  it is the bodys reaction to the virus. It reacts with inflammation To kill the virus the immune system releases toxic substances such as cytokines and interferons  these cause the symptoms. It is usually not possible to tell the cause of inflammation just by looking  allergy can cause the same symptoms.\n\nBecause viruses can cause almost any symptom, they are used by doctors as an excuse for anything they cannot explain  they are an excuse for intellectual idleness!\n\nThe best defence against viral infections is a healthy body and healthy immune system. The body reacts against viruses with inflammation and the results of inflammation is either directly toxic to the virus, or helps to physically expel virus from the body.