Lactose intolerance

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Written by Si Li Li
Gastroenterology
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What are the symptoms of lactose intolerance?

Lactose intolerance refers to the symptoms of diarrhea caused by the difficulty in digesting lactose in human milk or cow's milk due to a deficiency of lactase in the body, also known as lactase deficiency syndrome. It is primarily seen in infants and young children who consume milk as their main food, with the highest incidence in China among children aged seven to eight years old. In cases of lactase deficiency, it is advisable to avoid using cow's milk or human milk. Instead, soy milk or sour milk can be used as substitutes, as they do not contain lactose, thus avoiding the phenomena of lactose intolerance.

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Written by Wu Hai Wu
Gastroenterology
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Can lactose intolerance cause eczema?

Lactose intolerance generally does not cause eczema in patients. Lactose intolerance can be divided into primary lactase deficiency, secondary lactase deficiency, and congenital lactase deficiency. Patients with lactose intolerance mainly experience symptoms such as abdominal pain, diarrhea, nausea, vomiting, increased bowel sounds, intestinal colic, and bloating. Some patients experience reduced intestinal motility, leading to constipation, and the severity of symptoms is related to the amount of dairy products consumed. Therefore, a small number of patients can tolerate a certain amount of dairy products without experiencing significant symptoms, and the specific tolerable amount varies from person to person.

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Written by Wu Hai Wu
Gastroenterology
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What to eat when lactose intolerance causes nausea

Patients with lactose intolerance primarily show clinical symptoms related to the digestive tract such as bloating, increased bowel sounds, intestinal colic, diarrhea, nausea, vomiting, and more. Some patients experience reduced intestinal motility, leading to constipation, and the severity of symptoms is somewhat related to the amount of dairy products consumed. If a patient with lactose intolerance is experiencing nausea, they should eat light foods and avoid dairy products as much as possible. Patients with lactose intolerance should seek medical attention in a timely manner. When visiting a doctor, they should provide detailed medical history information to help the doctor determine the correlation between the clinical symptoms and lactose intolerance.

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Written by Zhang Xian Hua
Pediatrics
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Symptoms of infant lactose intolerance

Lactose intolerance in infants is mostly due to lactose intolerance secondary to post-viral infections, with a small portion being primary lactose intolerance caused by low activity or lack of lactase. This leads to undigested lactose after consuming animal milk, resulting in a series of clinical symptoms. Common symptoms include changes in stool; for lactose-intolerant children, there are relatively more curds in the stool, and the stool is somewhat loose and poorly digested. Additionally, children with lactose intolerance often have poor digestive function, increased gastrointestinal gas, and sometimes experience bloating and abdominal discomfort, which can also affect the baby's sleep.

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Written by Wu Hai Wu
Gastroenterology
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Lactose intolerance lacks what enzyme?

Lactose intolerance is caused by a deficiency of lactase, which can lead to diarrhea when consuming dairy products. Thus, patients with this condition should avoid consuming milk powder, cow's milk, goat's milk, etc. If they must consume dairy, they should choose products that have been specially processed. Patients with lactose intolerance can drink rice soup, thin porridge, millet congee, and similar foods. It is also important for these patients to maintain dietary hygiene, avoid overeating, and avoid binge eating. Eating small, frequent meals to ensure a steady supply of nutrients is recommended.

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Written by Dong Xian Yan
Pediatrics
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What to eat for lactose intolerance as supplementary food?

Children with lactose intolerance should avoid adding foods containing lactose when introducing solid foods. Additionally, you can make some food at home for the baby, such as cooking thin porridge, boiling noodles for the baby, mixing a lumpy soup, etc. You can also give the baby small amounts of fruits and vegetables, but they need to be cut into small pieces or juiced before feeding. The main treatment for lactose intolerance is dietary therapy, which involves avoiding foods containing lactose to effectively control and alleviate the symptoms of lactose intolerance in babies, such as milkshakes, cheese, and other dairy products which should not be fed to the baby.

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Written by Huang Gang
Gastroenterology
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Is weakly positive lactose intolerance serious?

Lactose intolerance is weakly positive, not particularly severe, and can be improved by taking oral lactase. For mild cases of lactose intolerance, symptoms can be alleviated after taking lactase. However, it is important to monitor the condition when consuming milk powder or milk. If symptoms persistently recur, it may be prudent to switch to extensively hydrolyzed milk powder or other lactose-free milk powder.

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Written by Wu Hai Wu
Gastroenterology
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How to deal with nausea from lactose intolerance?

Patients with lactose intolerance who experience nausea can consider using some medications for symptomatic treatment. For example, they can use meclozine orally or by muscle injection. They may also use medications that promote gastric motility, such as domperidone, mosapride, and itopride, to treat impaired gastric motility. Patients with lactose intolerance may also experience bloating, vomiting, abdominal pain, diarrhea, and constipation. Appropriate symptomatic treatments can be taken according to different symptoms. Lactose intolerance, if due to a secondary disease such as Crohn's disease or ulcerative colitis, requires active treatment of the primary disease. (The use of medications should be under the guidance of a professional doctor.)

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Written by Li Jiao Yan
Neonatology
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Symptoms of baby lactose intolerance

If a child has lactose intolerance, the main symptoms are related to the digestive system, such as frequent bloating. Children may experience bloating and restlessness at night, and even signs of intestinal colic. There are abnormal bowel movement frequencies, such as constipation for several days, as well as diarrhea with a noticeable increase in stool frequency and a looser stool consistency. Sometimes, there may be symptoms of bloody stools, which should alert caregivers to the possibility of lactose intolerance. Lactose intolerance is divided into primary and secondary forms. Primary lactose intolerance is more common in Chinese due to genetic factors. Secondary lactose intolerance is mainly due to other reasons that lead to a deficiency of intestinal lactase, with infections and acute gastroenteritis being common causes. For children with lactose intolerance, lactase can be added to breast milk or lactose-free formula can be used. It is also advised to regularly recheck urinary lactose levels. If levels return to normal, breastfeeding can continue. If abnormalities persist, gradually introduce solid foods, as a normal diet usually does not significantly affect the child.

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Written by Tong Peng
Pediatrics
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Can infant lactose intolerance be self-healing?

Whether infant lactose intolerance can self-heal needs to be identified as either congenital or secondary. If it is congenital lactose intolerance, it means that the baby's own intestines cannot produce lactase, and thus the symptoms of lactose intolerance cannot be alleviated. However, secondary lactose intolerance, such as that caused by chronic diarrhea or infection which leads to a reduction in lactase, can be recoverable. The reduction in lactase production caused by chronic diarrhea does not mean that the intestines have lost their normal function to secrete lactase. Therefore, by using lactose-free formula or avoiding foods containing lactose, the normal intestinal flora can be repaired, achieving relief from the symptoms of lactose intolerance. Additionally, if there is a viral infection, particularly rotavirus infection-induced lactose intolerance, it can also be alleviated through dietary adjustments to promote the repair of the intestinal flora. Therefore, the treatment of lactose intolerance should vary from person to person, and it is important to identify early whether it is primary or secondary.