Shape-adapted Self-Gelation Hydrogel Powder for High-Performance Hemostasis and Wound Healing

•The hydrogel powder can re-physically crosslink without additional conditions, and quickly gelation (< 3 s).•The hydrogel powders have good wet adhesion and rapid hemostasis (< 30 s).•Tea polyphenols in the hydrogel, endowing the material with excellent antibacterial anti-inflammatory ability.•Trace amounts of YNBY greatly enhance hemostatic efficiency and promote the regeneration of epidermis, hair follicles, and blood vessels.•The coating of hydrogels improved the biocompatibility of YNBY and prolonged the drug action time.