The whole plant of Solanum nigrum can be used as medicine, which tastes bitter and loves, clearing away heat and toxic materials, promoting blood circulation and reducing swelling. Can be used for treating sore, cancer, swelling, traumatic injury, edema, etc. Modern pharmacological research has found that it has anti-tumor effect, so many Chinese medicine practitioners like to use it to treat cancer, but the curative effect needs further verification.

As a traditional Chinese medicine, Solanum nigrum is mostly used as whole grass, and few Solanum nigrum fruits are used as medicine alone. In fact, Solanum nigrum fruit is a good medicine for treating oral ulcer blindly, which is widely used by grass-roots Chinese medicine, and the materials are convenient and cheap.

The simplest way to treat oral ulcer with Solanum nigrum fruit is to make it into Solanum nigrum powder. Powder is a common dosage form for treating oral ulcer in traditional Chinese medicine, which is simple to make and convenient to operate. Take about 1 kg of fully ripe Solanum nigrum fruit, squeeze it to get juice, then dissolve 50 g of alum in Solanum nigrum juice, put it in a casserole and bake it with 5 fire, then grind it into very fine powder and seal it.

When oral ulcer occurs, apply proper amount to the sore surface, 3-6 times a day. Some Chinese medicine scholars have found that Solanum nigrum fruit has good bactericidal and bacteriostatic effects.

In addition, although Solanum nigrum fruit is delicious, it should not be eaten in large quantities. After all, Solanum nigrum is sad and prone to stomach failure. It should be specially reminded that especially the immature Solanum nigrum fruit is inedible, because it contains solanine, which is easy to cause poisoning.