Generally, there are two types of allergens, one is in vivo testing and the other is in vitro testing.

In vivo tests include intradermal tests, prick tests, and patch tests. Intradermal test and prick test are mainly to puncture the allergen into the patient's skin to observe whether there is an allergic reaction.

For example, doing a penicillin skin test is this method, but this method needs to know what the allergy is, or take several allergens to test one by one to verify which allergy it is, but this girl has been allergic to this and is not suitable now.

The patch test is mainly used for cosmetics or metals, like there was a copper allergy before, as long as you take copper products and rub it on the patient's body, you can see it immediately, cosmetics are applied behind the ears or on the inside of the upper arm, whether it will be allergic to see if there is redness and swelling.

But it doesn't apply now.

Therefore, only in vitro tests, mainly blood draws, IgE antibody tests and IgG antibody tests (food intolerance tests), only a drop of blood is enough, and the accuracy rate is still high.

The nurse came and drew the blood and immediately took it to the laboratory for testing.

At this time, the girl woke up leisurely, opened her eyes, her eyes were blank, and she suddenly screamed, stretched out her hands and groped wildly, "Where am I?" What's wrong with me? ”

"What's wrong? What's wrong? The classmates hurriedly turned around.

"I can't see it!" The girl burst into tears, groping with her hands dazedly, tears rolling and falling.

"What?" The classmates were all surprised and looked at the girl, how could she not see when she was obviously open?

"Don't be afraid, I'm a doctor, let me see!" Guo Xiang hurriedly took out a small flashlight and shone it into the girl's eyes, and there was a reaction, but there was no focus.

Guo Xiang stretched out his finger and shook it in front of the girl, "Can you see it?" ”

"I can't see, I can't see anything, it's pitch black in front of me, what's wrong with me?" The girl was crying, panicking with a pair of blank eyes, and the other classmates were shocked, she wouldn't be blind, right? How so?

"Don't be afraid, don't be afraid!" Guo Xiang grabbed the girl's hand and comforted her, "You are temporary, it should be a temporary blindness caused by allergies, as long as the allergy is resolved." ”

"You're a doctor?" The girl hurriedly clasped the doctor's hand, with tears on her face, "I'm really not blind?" Isn't it blind? Doctor, please help me! ”

"Don't be afraid, you're not blind, you're not blind, your eyes still react to light. We are looking for the cause, and if we find the cause, it will be good to treat it. Do you usually have allergies to anything? Guo Xiang asked.

"It doesn't seem to be ......" The girl wiped the tears from the corners of her eyes and sobbed, as if she remembered something.

"But I've been looking for measles, and I've been going back and forth for years. My parents also took me to the hospital to see me, both Chinese and Western medicine, and I took countless medicines, but it didn't work at all, and I still often had rashes. Is this also because of allergies? ”

Guo Xiang nodded, "Very likely." I just heard from your classmate that you ate jajanjangmyeon? Did you eat noodles before? ”

"I eat, but I eat very little, I'm a southerner, I usually eat rice, and I've eaten noodles a few times, but it's fine." The girl said.

"How long does it take to have a sports day after eating jajangmyeon?" Guo Xiang asked the classmates on the side.

"It didn't take long to finish eating, right?"

"But Lin Nan's project seems to be two hours later?"

"She started to do some warm-up exercises for a while before it was her turn, and she fainted after running for a long time."

The classmates chattered.

Guo Xiang nodded, he had already guessed something in his heart, and waited for the test results over there.

Not long after, the test results came out, and sure enough, it was a wheat allergy!

"How so?" The girl was very strange, "I usually eat noodles, and sometimes I eat biscuits, bread or other things made of wheat, and it's all right?" ”

Guo Xiang nodded, "Yes, it's okay for you to eat pasta usually, but today's mistake is that you exercise after eating, you are 'wheat dependent exercise symptoms'." ”

"What do you mean?" The classmates all looked at Guo Xiang and didn't quite understand.

"That is to say, if you eat pasta or wheat-containing food, if you exercise within six hours of eating, you will have a severe allergic reaction, and if you don't exercise, you will not have an allergic reaction." Guo Xiang said.

"So weird?" Everyone is surprised, there is such a thing?

"I suspect that your measles is also caused by wheat allergies, but you usually eat less pasta, maybe just a small amount of wheat in some foods, so it is not serious, but the body still reacts, so long-term measles is not good." Guo Xiang said.

"In the future, try not to eat or eat less pasta or wheat products, and if you do eat it, don't exercise, stay in the dormitory, and it's best to stay in bed." Guo Xiang said.

"And what if something you don't know it's made of flour?" A classmate asked.

"I'll prescribe some medicine for you, and in case this happens in the future, take medicine quickly, save your life first, and then go to the hospital." Guo Xiang said that now she knows that she is allergic to wheat, as long as she takes symptomatic medicine.

"When the medicine is applied, your wheals will disappear, and your eyes should be able to see." Guo Xiang said, and immediately prescribed a prescription for the nurse to dispense the medicine.

"That's great!" Several classmates are happy for the girl, and they are really afraid that she is really blind, so how to explain it to her parents.

"Be careful in the future, don't pull Lin Nan to eat noodles again."

"Isn't it impossible to eat cakes and bread?"

"Can't eat steamed buns?" Several classmates talked about it.

"Yes, it's best not to eat all foods containing wheat, although you may be fine if you don't exercise, but you will still get measles and itch very badly, right?" Guo Xiang said.

"Yes, it's so itchy that it makes me want to die. I don't eat, I must take care of my mouth. The girl nodded, but it was uncomfortable not to eat cake, she liked sweets.

With the injection of anti-allergy medicine, the wheal on the girl's body slowly went out, and her eyesight also recovered, so she breathed a heavy sigh of relief, and she was really worried that she was really blind, and her life would be ruined.

In the afternoon, Guo Xiang came to see the girl, and she was almost fine.

"Doctor, can I be discharged?" The girl asked.

"It's best to observe overnight and then be discharged tomorrow." Guo Xiang said that if something happens again, after all, when I came in the morning, it was so serious, and the shock and blindness were still very scary.

"Then stay one night, be careful!" The teacher who came with the car said.

The next day, Guo Xiang examined the girl again and made sure that she was okay before she was discharged from the hospital.

When she was discharged from the hospital, she was repeatedly told to eat less wheat products in the future, and she nodded in agreement.

However, there are few detailed ingredient ingredients on the current food ingredient list, and sometimes it is impossible to prevent it, so you can only pay attention to it as much as possible.