Polymeric hydrogels have attracted a lot of attention for usage in biomedical applications due to their biocompatibility and propensity to expand in wet circumstances. Poor stimulation resistance and insufficient mechanical strength, however, pose considerable obstacles to their usage in a variety of applications. Hydrogels having the ability to self-repair after being ruptured or traumatised are a solution to this problem. Stability and durability are improved by their capacity to self-repair, reclaim lost mechanical properties, become injectable, and stretch. The various covalent and non-covalent interactions amongst the self-healing mechanisms of these hydrogels are the primary focus of this review. Methods for studying their self-healing properties are outlined, and their uses in tissue engineering systems, drug delivery, cell encapsulation, and wound healing are discussed. Hydrogels' potential for wound healing is highlighted with a brief overview of studies on various composite materials. Incorporating composite materials into these hydrogels is a common way to boost their mechanical properties.

Polymeric hydrogels have attracted a lot of attention for usage in biomedical applications due to their biocompatibility and propensity to expand in wet circumstances.