When women have vitamin B12 deficiency, it often leads to vitamin B12 deficiency anemia, which can cause the following symptoms, mainly including multiple systems of the body, namely the digestive system, the blood system and the neuropsychiatric system, as follows: 1. In the digestive system, patients can develop atrophy of the oral mucosa and tongue papillae, and the tongue can become beef-like tongue, sometimes accompanied by tongue pain. 2. 2, if the gastrointestinal mucosa atrophy, can also lead to nausea, lack of appetite, diarrhea, bloating and constipation, etc. 3, the blood system, can make patients appear pale, weakness, dizziness and panic, etc., the performance of serious can also lead to a reduction in complete blood cells, such as recurrent bleeding, infection, etc. 4, neuropsychiatric symptoms, can lead to ataxia, taste, sense of smell In terms of neuropsychiatric symptoms, patients may suffer from ataxia, reduced sense of taste and smell, severe incontinence, and mental confusion such as hallucinations and delusions.