Do indented scars heal on their own?

Dented scars usually do not heal on their own.
Depressed scars usually occur after trauma, acne, infection, surgery, etc., as these conditions tend to result in a loss of the dermis and subcutaneous tissues of the skin, which then heals due to a loss of collagen and elastin in the skin, leaving a depressed scar.
Scars do not go away and can only be improved in a number of ways. Generally, relevant treatments are needed to improve the appearance of the scar. For shallow depressed scars, topical medications, such as growth factor gel, can be prescribed to promote tissue regeneration in the depressed area, which can improve the degree of depression to a certain extent.
At present, the commonly used treatment modalities include laser treatment or surgical treatment (autologous fat filling, excision, etc.) to repair.
It is recommended that patients who wish to undergo treatment go to a regular hospital and choose the appropriate restoration method under the guidance of a specialist.