Doctor insights on:
Onion Allergy Hives
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
Yes: Yes hives can be a result of allergy to foods, inhalant allergen or medications. However in many chronic cases (almost 70-80%) an exact cause cannot be detected. It can be very frustrating to the doctor and patient and can be very challenging to find a cause and get it under control. ...Read more
Several causes: The most common causes of hives are allergy, autoimmunity, and physical stimuli. Foods or drugs can cause hives - peanut and shellfish are common food allergens, and Ibuprofen and penicillin are common drug allergens. Some hives are due to physical stimuli such as cold, heat, pressure or stroking of the skin. ...Read more
Yes if when with dog: Any severe allergy can cause hives in the allergic person, so yes, hives could be due to a dog. More people are allergic to cats than are allergic to dogs, by a large percentage, but some people have life- threatening dog allergies. Severe reactions can include eye swelling, throat- closing, coughing and asthma, and shock, as well as skin rashes including hives. ...Read more
Antihistamine: It depends on what the cause for your hives may be. Unfortunately, although hives can usually be controlled with antihistamine, we often can't find the cause for them. If the hives have lasted over 6 weeks, see an allergist. Otherwise, keep on scratching if otc antihistamine fails. ...Read more
What are the causes of daily hives. I know its an allergy to something but having no luck with testing.?
Chronic urticaria: Sounds like you have chronic urticarial. While allergies may play a role of causation in many of these cases, others are caused by environmental circumstances - hot or cold environment, stress, or other non-allergic conditions. Still best to work with allergist to find out what your triggers may be and explore alternative options for treatment. ...Read more
I break out in very bad large hives. Itch terribly. I have been allergy tested, all neg. What may b cause?
Damn hives: Most people that have chronic urticaria, hives lasting more than 6 weeks, have ciu, chronic idiopathic urticaria. Allergy is probably responsible for only 5 - 10% of ciu. Recent data suggests some chronic hives are autoimmune and occasionally they can be a marker of other systemic diseases. A good history will usually direct evaluation if any. Controlling medications reason for allergist consult. ...Read more
What makes hives come out, and do the different types of allergies cause different sizes or different types of hives?
Broke out into hives, maybe 40 over body. Its been 2 days. Should I be worried and see a Dr? Or just take OTC allergy meds and it should go away?
Depends on trigger: Urticaria (hives) is common, affecting up to 20% of the population. Acute hives is defined as periodic outbreaks of red, raised itchy lesions that resolve within 6 weeks. Common viral and bacterial infections can trigger an outbreak, however medications, foods, and insect stings can also cause acute hives but have the potential to lead to more serious complications. ...Read more
I get hives everyother day and I have been tested for allergies but they found none, the dr says he can't help me any further. Is there anything else?
Yes: Although a cause for chronic hives is often unknown, a majority of the hives can be controlled with medications and other treatments. Allergy skin testing is rarely helpful in evaluating chronic hives and thus your negative tests were not unexpected. Consult an allergist and in the meanwhile try taking your antihistamine up to 4 x daily regularly. Don't despair. ...Read more
Allergic shiners: Those dark circles under the eyes are commonly called allergic shiners. They are due to back up of blood in the small blood vessels due to significant nasal congestion. It takes a while, but with treatment of the nasal congestion, the "allergic shiners' will gradually improve. Hive are usually treated with antihistamines and finding the cause of the hives so avoidance measures can be done. ...Read more
Subtle: hives can occur as part of an allergy syndrome. People with chronic hives or who have an inborn low threshold for hives have difficulty differentiating simple hives from drug allergy. If the drug reaction is IgE-mediated, or occurs via a similar pathway without IgE, then one would expect additional symptoms other than hives (breathing problem, dizzy, nausea, swelling, headache, etc) ...Read more
All of them.: If someone has hives that are consistent with allergy, they may be tested to most of the food allergens if it is unclear which foods are the likely culprits. However, frequently people that have hives due to allergy have a pretty good idea which food or foods may be the cause. Most common food allergens are milk, egg, wheat, corn, soybean, peanut, tree nuts, and shellfish. ...Read more
Anaphylaxis perhaps: That's the name for severe allergic reactions. Any reaction that is very severe can progress to life-threatening symptoms like throat closing, hoarseness, chest tightness, asthma, or circulatory collapse (shock). Skin manifestations like hives are not usually dangerous; just uncomfortable and unsightly. ...Read more
Depends on trigger: Urticaria (hives) is common, affecting up to 20% of the population. Acute hives is defined as periodic outbreaks of red, raised itchy lesions that resolve within 6 weeks. Common viral and bacterial infections can trigger an outbreak, however medications, foods, and insect stings can also cause acute hives. An Allergist might determine cause of hives without testing, but depends on clinical history ...Read more
See an allergist: The best treatment for hives is to avoid whatever is causing them; an allergist can help with the identification. In the majority of cases in which no cause can be identified, prescription medications can be vastly more effective than what is available over the counter. ...Read more
See allergist: There are different types of solar allergy and your best bet would be consulting an allergist. ...Read more
Is it possible to get hives for no reason? I have no allergies, but break out in them occasionally.
That's usually the case: Most of the time hives have no clear reason, there are different forms of hives (urticaria) with different known reasons, sometimes hidden, if you really suffer, having those hives more often and for prolonged periods, or not controlled, see an allergist. Check aaaai. Org or acaai. Org for an allergist in your area, good luck ...Read more
What are the symptoms of an allergy to cats if you usually are fine with cats, but got hives visiting another cat?
Depends: Most typical allergic symptoms to cat are nasal, like hay fever, or asthma. There may some species that may cause more severe symptoms. One can have hives with contact to dander or saliva, or may possibly be a sign of a more severe reaction. If symptoms begin without seeing or touching the animal, allergic sensitivity may be quite severe. ...Read more
Recently, I have tried benedryl but the hives aren't going away. I have steered clear of the allergy, what else can I do/take?
Zyrtec (cetirizine): 1-2 times per day.Get a more detailed answer ›
Started having hives/itching. They come on at any time. Normal allergies have never been this way. It can start on any part of the body.
Urticaria: 50% of the time one would never know the cause of allergic reaction. Spontaneous or idiopathic urticaria (for now) could be due to heat, cold, exposure to sun, any specific ingredient in the food that you are taking, detergent, air born (from the tree or grass). If they are happening very frequently or severely then you need to see the doctor to determine the cause. ...Read more
Hello. I am experiencing hives from my alcoholic allergy and I took 3 pills of loradatine but I get sudden pains. Can you explain that to me?
I'm getting hives all over my body and I've already had all kinds of allergy test and it all came back negative, I don't know what else to do?
I had an allergy shot two days ago. Had a site reaction larger than a half dollar-remains. Today woke up with hives on body and face. Related?
Daughter had hives on and off for 5 days last week and now my other child is getting neither has any allergies. What kind of illnesses can cause this?
Viral illness: I suspect a viral illness. This would be a ready explanation since they both have a suggestion there is a contagious component ...Read more
Wife suffering frm severe food allergic reactions (hives).Done food allergen tests. Avoided all of them, but stll allergy reappeared. Reasons&suggestions?
See below: Did she eat any new foods? What symptoms is she having besides urticaria? ...Read more
I'm 42, I have had chronic hives since I was 19. 1-2 episodes a year, each episode lasting 3-4 months. I have them now. On every allergy med. Help me pls?
Try antihistamine: Given that you have hashimoto's, the problem is likely an autoimmune one. Since it has been present for over 20 years without causing any damage, consider taking an antihistamine up to 4 doses per day. However you should try to find something without the drowsy effect of Benadryl (diphenhydramine) if possible. ...Read more
Call your allergist: The purpose of going to be tested is to determine your allergies and the doctors office most likely marked the spots. Typically the office will instruct you on what to expect and what to do following the testing. ...Read more