The instant disclosure relates to a wound dressing, which includes a plurality of hydrogel particles and a dressing. The hydrogel particles are granular colloids capable of absorbing and releasing the fluid, and the hydrogel particles are disposed to fill up the wound entirely. The dressing is covered on the wound to seal the hydrogel particles inside the wound. Thus, the wound dressing can maintain the appropriate balance of moisture in the wound environment to promote healing.
