2, nourishing, detoxification: crabs have the effects of clearing away heat and toxic materials, nourishing bones and marrow, nourishing tendons and promoting blood circulation, dredging meridians, benefiting limbs, continuing injuries, nourishing liver yin and replenishing gastric juice. It has a certain therapeutic effect on congestion, injury, jaundice, waist and leg pain, rheumatoid arthritis and other diseases.