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

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

For example, penicillin skin test is this method, but this method needs to know what allergy it is, or take several allergens to test one by one to verify which allergy it is, but this girl has been allergic. Now it's not suitable.

The patch test is mainly used for cosmetics or metals. For example, there was a person who was allergic to copper before. As long as you rub the copper product on the patient, you can see immediately. The cosmetics are applied behind the ear or inside the upper arm. Whether there is allergy depends on whether there is redness and swelling.

But it doesn't apply now.

Therefore, only in vitro testing, mainly blood sampling, IgE antibody detection and IgG antibody detection (food intolerance detection), as long as a drop of blood, the accuracy is still high.

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

At this time, the girl woke up, opened her eyes, and suddenly screamed, stretched out her hands and fumbled, "where am I? What's the matter with me? "

"What's the matter? What's the matter? " The students hurried around.

"I can't see!" The girl burst into tears, groping with her hands blankly, and tears rolled down.

"What?" The students were surprised and looked at the girl. Why couldn't she see with her eyes open?

"Don't be afraid, I'm a doctor. Let me see!" Guo Xiang quickly took out his small flashlight and shone it in the girl's eyes. There was a response, but there was no focal length.

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

"I can't see. I can't see anything. It's dark in front of me. What's the matter with me?" The girl cried and panicked with a pair of blank eyes. Other students were shocked. Won't she be blind? How did this happen?

"Don't be afraid, don't be afraid!" Guo Xiang grabbed the girl's hand and comforted her, "this is temporary. It should be temporary blindness caused by allergy. As long as the allergy is solved."

"Are you a doctor?" The girl quickly clenched the doctor's hand with tears on her face, "am I really not blind? Are you blind? Doctor, please help me! "

"Don't be afraid. You're not blind. Your eyes still respond to light. We are looking for the cause. If we find the cause, the treatment will be good. Are you allergic to anything? " Asked Guo Xiang.

"I don't think so..." the girl wiped the tears from the corners of her eyes and choked, as if she remembered something.

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

Guo Xiang nodded, "very likely. Your classmate said you ate fried noodles just now? Did you eat noodles before? "

"Yes, but I eat very little. I'm from the south. I usually eat rice and noodles several times, but I'm all right." The girl said.

"After eating fried noodles with sauce, how long will the sports meeting be held?" Guo Xiang asked the students nearby.

"It didn't take long to start after dinner?"

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

"She began to warm up for a while before it was her turn. She fainted after running for a while."

The students began to talk.

Guo Xiang nodded. He had guessed something in his heart and waited for the test results there.

After a while, the test results came out. It was really wheat allergy!

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

Guo Xiang nodded, "yes, you usually have no problem eating pasta. Today's mistake is that you exercise after eating. This is' wheat dependent exercise symptom '."

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

"That is to say, if you eat pasta or food containing wheat, you will cause serious allergic reaction if you exercise within six hours after eating. If you don't exercise, you won't have allergic reaction." Guo Xiang said.

"So strange?" Everyone was surprised that there was such a thing?

"I suspect that your measles search is also caused by wheat allergy, but you usually eat less pasta. Maybe some foods contain a small amount of wheat, so it's not serious, but your body still reacts, so it's not good to search for measles for a long time." Guo Xiang said.

"In the future, try not to eat or eat less pasta or wheat products. If you really eat it, don't exercise. Stay in the bedroom. It's best to stay in bed." Guo Xiang said.

"What if something is made of flour?" A classmate asked.

"I'll prescribe some medicine for you. In case of this situation in the future, take the 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 drugs.

"When the medicine is used, your wind mass will disappear, and your eyes should be able to see it." Guo Xiang said that he immediately prescribed a prescription for the nurse to dispense the medicine.

"That's great!" Several students are happy for the girl. I'm really afraid she's really blind. How can I explain to her parents.

"Pay attention in the future. Don't pull Lin Nan to eat noodles."

"Can't you eat the cake and bread?"

"You can't eat steamed bread?" Several students said it.

"Yes, it's best not to eat all foods containing wheat. Although it may be fine without exercise, it will still find measles and itch hard, right?" Guo Xiang said.

"Yes, it's so itchy that I want to die. I don't eat. I'll take care of my mouth. " The girl nodded, but it's hard not to eat cake. She likes sweets.

With the injection of antiallergic drugs, the wind mass on the girl slowly extinguished and her eyesight recovered. It was a great relief. I was really worried that if I was really blind, my life would be ruined.

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

"Doctor, can I leave the hospital?" The girl asked.

"It's best to observe all night and leave the hospital tomorrow." Guo Xiang said that in case anything happens again, after all, when I came here in the morning, it was so serious that I was shocked and blind.

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

The next day, Guo Xiang checked the girl again and let her out of the hospital only after she was sure she was all right.

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

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