Liquid lactic acid may offer some potential benefits for treating allergies. Lactic acid is a naturally occurring by-product of fermentation and is found in fermented foods, such as lactic acid in yogurt and sauerkraut. When ingested, lactic acid can help improve the body's immune response to allergens, as it possesses anti-inflammatory and anti-allergenic properties. It can help reduce the body's production of histamine, which is a chemical released when the body has an allergic reaction. The lactic acid pharmaceutical uses about treating allergies is based on its ability to improve skin barrier function and regulate skin microecology. It should be noted that people with allergic skin should conduct a patch test before using lactic acid medical products. Additionally, lactic acid used in medicine can help reduce nasal congestion and improve the body's absorption of essential vitamins and minerals, which also help to improve overall health. And, more and more dermatologists recommend a skincare routine that includes lactic acid medicine use to help improve skin’s texture and reduce the appearance of fine lines.