Doctor insights on:
Can Anaphylaxis Have A Delayed Onset
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 more
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
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
How quick would anaphylaxis set in after wasp sting? Got stung by 4 yellow jackets about 4 hours ago. Can there be delayed anaphylaxis?
Possible: But delayed anaphylaxis is non-existent or rare from stinging insect since it usually occurs within minutes. Can you tell us a little more about your symptoms? In general, later the anaphylaxis occurs the milder the severity. Multiple (likely >10) stings may however cause symptoms from the venom dose even if you were not allergic in the first place. ...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
What's the best way to stop a food allergy (immediate or delayed, but not anaphylactic shock) reaction?
Benadryl (diphenhydramine): If a reaction such as itching happens to a food- an antihistamine like Benadryl (diphenhydramine) 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 more
Worried about adult onset allergies and anaphylaxis and dieing please help me put my mind at ease very worried and paranoid?
Relax: If you are worried about anaphylaxis from a certain food or medicine, it can be avoided, you can always carry an antihistamine tablets and epinephrine injection for accidental exposure, there are warning signs and can be managed, you may want to see an allergist if you have access to one. If this is not the case, spontaneous anaphylaxis is non-existent as far as I know, otherwise c a psychologist ...Read more
As an adult I developed allergies to tree nuts, honey, celery & mangos. 1 case of anaphylaxis. Does it sound like leaky gut or adult onset allergies?
Probably allergies: A board cetified allergist can answer this question with a few simple tests. ...Read more
Life-threatening rxn: Anaphylaxis is a life-threatening allergic reaction affecting several parts of the part simultaneously. Mast cells release histamine & other substances making blood vessels leaky. The plasma leaking out causes swelling in the skin (hives & angioedema) & windpipe (laryngospasm) as well as asthma, vomiting, gut pain. If enough plasma leaks out the patient may go into shock. Death may ensue. ...Read more
Any nut can!: Nut allergy can lead to very serious allergic reactions called anaphylaxis. This has been described for multiple nuts. The most common nut to cause reactions is walnuts, followed by cashew, pistachio, almond, pecan and hazelnut. Coconut (some people debate if this is a nut) anaphylaxis is uncommon. Nut allergy is likely to persist and best treated with the help of a board certified allergist. ...Read more
Symptoms: Anaphylaxis is a clinical diagnosis that includes 2 or more organ systems. Systems usually are skin (hives, swelling), respiratory (cough, wheeze), GI (stomach pain), or heart/blood vessel (low BP or loss of consciousness). Skin symptoms are almost always present. The most severe are breathing issues and loss of consciousness. ...Read more
Bad things happening: Anaphylaxis is a potentially life-ending allergic reaction. Parts of the body involved: skin, heart & respiratory & digestive systems. In anaphylaxis at least 2 are involved. Skin symptoms in 95% — hives, swelling of eyelids, lips, hands, feet or overall flushing. Falling blood pressure, fainting, difficulty breathing through throat or lungs, nausea, vomiting, diarrhea & sense of doom are others. ...Read more
You can die.: Anaphylaxis is a severe allergic reaction affecting many organs at once. Most serious is swelling shutting off movement of air through the windpipe & leakage of plasma out of the bloodstream leading to catastrophic loss of blood pressure, shock & heart stoppage. Death occurs in 1% of all episodes of anaphylaxis. Its victims are often children and young adults in the prime of life. ...Read more
Anaphylaxis: Epinephrine is the only proven effective treatment for anaphylaxis. There is no data to support any benefit from h1/h2 antihistamines or steroids. We give them to decrease the reaction but only Epinephrine is recommended in anaphylaxis. Give Epinephrine and call 911. Epi only has a half-life of 30 minutes. ...Read more
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 involves the whole body. ...Read more
Carry an EpiPen (epinephrine): If you have had anaphylaxis from a food or stinging insect, you should carry an Epinephrine auto injector from now on. You should also undergo a complete evaluation by a board certified allergist to help determine what you may be allergic to and need to avoid. ...Read more
Skin: hives, swelling lips, eyelids, hands, feet.
Gi: nausea, vomiting, cramps, diarrhea
breathing: difficulty breathing, coughing, tickle in throat, wheezing, chest pain.
Cardiovascular: rapid pulse, weak pulse, dizziness, sense that something is very wrong, loss of consciousness.
You don't have to have all of these symptoms to have anaphylaxis. Call 911. Lie down. Raise feet on 1 pillow. ...Read more
OAS: I believe you meant to ask if OAS can progress to anaphylaxis? Usually no, but allergic reaction can worsen and progress to be systemic, that depends on the allergen, degree of sensitivity and the amount being exposed to. Better avoid fruits that you know it can cause OAS, in case of accidental exposure, stop eating more, and take an anhistamine ...Read more
Unlikely: I have never heard of methylcobalamin causing anaphylaxis and given that it is a chemical that is naturally found in every cell of your body it is probably impossible to have such a reaction. However, a supplement containing methylcobalamin may contain fillers and binders that some could be allergic to, so one could theoretically have anaphylaxis to a B12 supplement caused by the other ingredients. ...Read more
Yes, but...: Yes, but it's unusual. It's more common from stings, due to bees, wasps, hornets, and some species of ants, because they inject a venom that some people are very allergic to. Susceptible individuals carry an "epi-pen" — an injectible cartridge of epinephrine, which counteracts the anaphylactic reaction. And they never forget to apply insect repellent when they go outside. ...Read more
Yes.: Anaphylaxis is often an extreme allergic reaction, but may not always be readily attributable to an allergy. Some people, for example, may experience anaphylaxis from exercise under certain circumstances. Most episodes of anaphylaxis may be linked to allergic sensitization as in the case of insect sting reactions, certain drugs, foods, and in some individuals with severe inhalant allergies. ...Read more
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