Cuttlebone is an astringent medicine, which is the inner shell of the needleless squid or golden squid of the squid family. It has the effects of astringency to stop bleeding (treating bleeding conditions with drugs that have astringent effect), fixing essence to stop bandages, collecting dampness and astringing sores, and suppressing acidity to relieve pain (suppressing gastric acid to relieve pain). Cuttlebone is astringent in nature, and can be used internally and externally to stop bleeding by astringency, and can be used for many kinds of bleeding inside and outside the body. It can be used with Diyu, Radix Rehmanniae Praeparata, and Pu Huang if it is used for treating women’s blood loss due to insufficient consolidation of the Chong Ren (the two channels of Chong Ren are weak, which affects the consolidation function), or bleeding under the umbilical artery (excessive menstruation or more than a few drops of menstruation). For the treatment of traumatic bleeding, it can be applied externally by grinding alone. Cuttlebone is good at warming and astringency, and can fix essence and stop the band. If the treatment of kidney deficiency is not solid spermatorrhea, spermatorrhea, can be used in the same way with Sha Yuan Zi, Cuscuta, Cornu Cervi; if the treatment of spleen and kidney deficiency and cold with thinning, can be used in the same way with Atractylodes macrocephala, Gorgonzola, Dangshen. Calcined, it can control acid and relieve pain, and is good for treating gastric pain and hyperacidity. This product can also be used externally to collect dampness and astringent sores, treating wet sores and eczema, and ulcers without astringency. The adverse reactions and contraindications of cuttlebone are not clear. If you need to use the medicine, you should consult your doctor first and use the medicine under the doctor’s guidance.