Jia Yin is a probiotic product that can replenish local probiotics. If a burning sensation occurs after use, the causes mainly include allergic factors and inflammatory factors, as follows: 1. allergic factors: a few people may have allergy-like symptoms to the product, which can be manifested as a burning sensation; 2. inflammatory factors: if the inflammation itself is heavy, when applying topical drugs, it may cause irritation to the original inflammatory tissue and cause a burning sensation. The burning sensation will occur as a result of stimulation. For example, if there is vaginitis or cervical ulcer, the surface mucosa itself is relatively problematic and may be more sensitive, resulting in a burning sensation.