neck food allergy

Food-related allergic reactions that occur in the neck are essentially allergic reactions triggered by food allergens. More than 80% of mild cases can subside by avoiding allergens + local care for 1-3 days without excessive stress. Only less than 5% of serious cases require systemic medication or medical treatment.

When I was in the clinic last Wednesday, I met a young girl born in the 2000s. She came in with her neck exposed. She had a patch of red that even reached her jawline. She was scratched so much that there were tiny blood spots. She said that she and her friends drank Yangzhi Manna the day before and thought it was from walking outdoors. After applying aloe vera gel for two days, it only made it more itchy. After a quick allergen screening, it was confirmed that she was allergic to mango. The reaction on her neck was worse than on her face. It was purely because the iced pulp flowed down the wall of the cup and onto her neck when she drank. She didn't take it seriously. In addition, she was wearing a high-collar base with lace that day, and the friction back and forth made the originally mild allergic reaction so obvious.

Many people think that allergies must occur all over the body, but why is it only the neck that itches and rashes? In fact, the thickness of the stratum corneum of the neck is only 2/3 of that of the face, and the barrier function is inherently weak. Splashing vegetable juices while eating or touching the neck with hands stained with allergens are equivalent to sending allergens directly to the fragile skin, and the contact concentration of allergens is higher than that of eating allergens in the stomach.

Here is a different opinion in the industry: Many dermatologists would classify food-related rashes that only appear on the neck as contact dermatitis, rather than traditional food allergy. After all, the former is only caused by local contact with allergens and will not spread as long as it is washed clean. The latter often triggers a systemic immune response after ingestion, which is likely to be accompanied by symptoms such as body rashes and swollen lips. The treatment logic of the two is actually different.

Don't eat and drink randomly, it's really unnecessary. I met a patient two months ago who said that her neck was itchy when she ate seafood. She had been avoiding shrimps and crabs for almost a year. After doing a patch test, it was found that she was allergic to the nickel metal in the alloy necklace she was wearing. It happened that she went out to parties every time she ate seafood, so she wore the necklace on purpose, and her timeline was interrupted. She missed a lot of delicious food for no reason.

It is really simple to determine whether the neck allergy is caused by food: first, look at the time difference, the rash will occur within 2-24 hours after contacting/eating the suspicious food, and you have had similar discomfort before eating the same food.； The second is to see if there are any other accompanying symptoms. If in addition to an itchy neck, numb lips, swelling of the inner wall of the mouth, or even a slight stomachache, it is basically certain that the food allergy is gone.

If it is just local redness and itching without any other discomfort, don't scratch it at the first time. Apply a cold wet towel for 10 minutes, which can relieve most of the itching. There are weak glucocorticoid ointments such as desonide and mometasone furoate at home. Apply a thin layer, up to twice a day, and it will be gone in two or three days.

I have to be honest here. Nowadays, many bloggers on the Internet say that "hormone ointments are bad for the face" and are pushing all kinds of pure natural plant ointments. I have encountered several patients who applied the so-called "pure natural Minlixiao". Instead, their necks became red and swollen, and exudation came out. Weak hormones are used in a non-delicate part of the neck for a short period of time. There is no dependence at all, and it is much safer than Xiaoxiao ointments with unknown ingredients.

If wheals begin to form on your body in addition to your neck, or you even feel that your throat is tight and breathing is a bit difficult, don't hesitate to take a piece of cetirizine or loratadine and go to the hospital quickly. Last year, a young man ate half a cashew nut. Within half an hour, his neck became so swollen that he could not even touch his jawline. When he arrived, he was speechless. This was a typical prodromal symptom of laryngeal edema. He only recovered after a shot of dexamethasone. This severe, immediate allergic reaction can be fatal, so don’t bear it.

To be honest, food allergies on the neck are really not a serious illness, just pay more attention to them. If you eat foods that are easy to cause allergies, such as mango, pineapple, and seafood, wipe them up quickly if they splash on your neck. Don’t just wipe your mouth. If you know what you are allergic to, try to touch it as little as possible. If you really want to do desensitization treatment, you have to go to the allergy department of a regular hospital for standardized oral immunotherapy. Don't blindly try the "eat one bite a day and slowly adapt" folk remedies at home. If something goes wrong, the gain will outweigh the loss.

Oh, by the way, here’s a little reminder: Don’t bathe in too hot water during an allergy attack, and don’t apply any whitening essence or exfoliating cream to your neck. The barrier is already weak, and further troubleshooting will only make it heal slower.