How long does it take for children to recover from food allergies?

There is no uniform recovery time for food allergy in children. It can take as short as a few months to tolerate spontaneously, and as long as it may last a lifetime. Individual differences are very wide.

I have been in the pediatric allergy department for almost ten years, and the luckiest baby I have ever seen was diagnosed with milk allergy at 6 months old. He only developed eczema when drinking ordinary milk powder. He switched to deep hydrolysis for more than three months, and then switched to moderate hydrolysis for two months. When he tried ordinary milk again, nothing happened. There are also particularly impressive cases. Last year, we treated a 12-year-old boy who went into anaphylactic shock after eating a bite of cashew nuts when he was a child. He has been strictly forbidden to eat these foods for so many years. Last time his classmate celebrated his birthday and accidentally ate half a piece of cake with crushed cashew nuts, and he was sent directly to the ICU. Now he has to carry an epinephrine pen with him.

The reason why there is such a big difference is the type of allergen that is most relevant. For food allergies that are common in infants and young children, such as milk, eggs, and wheat, almost 70% of babies can develop tolerance by about the age of 6. If the allergic reaction is mild, with only a small rash and mild diarrhea at the beginning, they may be able to eat normally by the age of two or three. However, if it is an allergy to peanuts, tree nuts, or seafood, the probability of spontaneous tolerance is less than 20%, and many people cannot touch it until adulthood.

The usual intervention method will also affect the speed of tolerance. When a parent heard that his child was allergic to eggs, he immediately avoided all foods related to eggs. Even other people in the family had to avoid the child when eating eggs. He did not dare to let the child touch any egg yolk for three years. When he came for a review, he did a provocation test. In fact, the child has long been able to tolerate it, and he was deprived of eggs for more than two years for no reason. On the contrary, some parents listen to the doctor's advice and take their children for review every six months. If the condition is stable, they will slowly try some hypoallergenic methods such as steamed egg yolks, and the tolerance will be much faster.

There is also controversy over whether early exposure to low-dose allergens should accelerate tolerance. Supporters believe that low-dose continuous stimulation can help the immune system gradually "familiar" with the allergen, and will not activate excessive defense upon exposure, but can speed up tolerance.； Those who oppose it are worried that ordinary parents do not have adequate judgment on dosage and allergic reactions, and rash attempts will induce severe allergic reactions and cause irreparable harm to their children. In fact, both of these statements are correct. The key point is to judge based on the degree of allergy of the baby. If the baby only has a mild rash and does not affect the growth and development, you can slowly try to contact it under the guidance of a doctor. If the baby wheezes or even becomes confused when exposed to severe reactions, it is definitely safer to strictly avoid it first.

Nowadays, there are specialized oral immunotherapy treatments that can help babies build tolerance, but they are not suitable for everyone. They must undergo a complete set of examinations and be monitored by a doctor throughout the process. Do not blindly try "just a small amount and it will be better" on your baby at home. If something goes wrong, it will be too late to regret it.

In fact, there is no need to always worry about "how long it will take to get better." Each baby's immune system develops at a different pace. Some babies will develop immunity at 1 year old, while some will not stabilize until 1 and a half years old. There is no need to rush the progress. Regular follow-up visits and adjusting the care plan according to the baby's situation are enough.