Can Hei Shun Pian be used for excessive liver fire?
Generally speaking, Heishunpian should not be used in cases of excessive liver fire. The detailed explanation is as follows:

Heishunpian has multiple functions, including enhancing fire to support yang and dispersing cold to relieve pain. It is primarily used to treat symptoms such as kidney yang deficiency, cold limbs and weak pulse, and insufficient heart yang. It also significantly alleviates pain caused by invasion of cold. However, these effects are not suitable for symptoms of excessive liver fire. Patients with excessive liver fire should, under a doctor's guidance, choose herbs such as Prunella vulgaris, chrysanthemum, or cassia seeds, which are known for clearing liver fire.
Excessive liver fire is often caused by emotional depression, irritability, or consumption of spicy foods. Common symptoms include mouth ulcers, swollen and painful gums, and irritability. Heishunpian is strongly warming in nature and may worsen the condition of patients with yin deficiency and excessive internal heat or blood heat syndromes. Therefore, such patients should avoid using Heishunpian. It is recommended to use traditional Chinese medicine under the guidance of a qualified TCM practitioner to prevent improper medication that could aggravate the condition.
In daily life, patients should also adjust their diet, avoid spicy and greasy foods, maintain emotional stability, and engage in appropriate physical activity to promote overall health.