Doctor insights on:
Possibly: Anaphylaxis is a life threatening allergy reaction that occurs within minutes to hours of being exposed to the allergen in question. Very rarely one can see anaphylaxis that is delayed and not occur for a couple of hours after exposure. More commonly one sees anaphylaxis that occurs immediately then the symptoms recur hours later -- this is called a biphasic response. ...Read moreSee 1 more doctor answer
Anaphylaxis is a severe, whole-body allergic reaction to a chemical that has become an allergen. After being exposed to a substance such as bee sting venom, the person's immune system becomes sensitized to it. When the person is exposed to that allergen again, an allergic reaction may occur. Anaphylaxis happens quickly after the exposure, is severe, and ...Read more
Wasp sting yesterday upper R arm, area very red/swollen/itchy today (3in diam), some wheezing, SOB, dizziness this AM - delayed anaphylaxis?
Rare but possible: It is exceedingly rare, but not unheard of, to have delayed anaphylaxis to a sting, and the mechanism, of course, is unexplainable (theoretically, perhaps, T-cell mediated anaphylaxis to peptide components). Regardless, you should be seen urgently for a proper assessment of your airway, and treatment as indicated. A referral to allergist should be the next step. ...Read more
If you have anaphylaxis do you have hives all over your body? Also how quickly does anaphylaxis happen from a food allergy? What if it is delayed?
Anaphylaxis: You can still have it without hives allover,although generalized hives can be part of anaphylaxis but not necessary,anaphylaxis means acclerated allergic reaction affecting vital system and other body organs,the skin is one of them.Allergic food reactions most of the time are within minutes,rarely hours,beyond that reactions aren't of the anaphylaxis magnitude.Avoid triggers,keep epinephrine handy ...Read more
What's the best way to stop a food allergy (immediate or delayed, but not anaphylactic shock) reaction?
Benadryl: If a reaction such as itching happens to a food- an antihistamine like Benadryl may help. However, be careful with food allergies because they can worsen each time you eat that particular food. Therefore the first time you may feel just mild itching and swelling but the next time it could be a full anaphylactic reaction. The safest thing to do is to avoid the food until you get allergy tested. ...Read moreSee 2 more doctor answers
How long does it take for food allergies to develop? If you have delayed allergic reactions, is it possible to eventually become anaphylactic?
Food allergy: A person, due to the right timing of exposure in the predisposed, can develop food allergies at any time in her/his life to any food. However most food allergies are due to the common highly allergenic foods, such as nuts seafood milk eggs soy ; wheat. It is unknown if delayed reactions can become anaphylactic; however if there is evidence of an ige reaction to a food, caution is the best remedy. ...Read more
Within minutes: Anaphylaxis is a severe, potentially life-threatening allergic reaction that involves multiple parts of the body (lungs, heart, skin, & gut). If you are allergic to a food, medicine, or stinging insect, exposure may cause anaphylaxis quickly. This is why sensitive patients should carry self-injectable Epinephrine with them at all times and not delay using it at the first sign of a reaction. ...Read moreSee 2 more doctor answers
Drug Reactions: Most allergic reactions occur within hours to two weeks after taking the medication and most people react to medications to which they have been exposed in the past. This process is called "sensitization." however, rashes may develop up to six weeks after starting certain types of medications. ...Read moreSee 1 more doctor answer
You may die: Anaphylaxis ends in death in about 1% of episodes. Delayed administration of Epinephrine increases the risk of death & the likelihood of persistent symptoms & hospitalization. The treatment of anaphylaxis is the prompt administration of injected Epinephrine (epipen) followed by medical observation & if necessary supportive care. This action significantly increases your odds of being in the 99%. ...Read more
Many causes: Severe allergic reactions (anaphylaxis) can be from stinging insects, foods, medications, latex, allergy shots, exercise, and idiopathic (about 1/3 of reactions, there is no cause found). These reactions can resolve with treatment, but some go on to be fatal especially if there is a delay in giving Epinephrine or the person has asthma. ...Read more
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