Milia in scar tissue means more
Small white dots in a healing wound are a marker of a scarring disorder in the skin.
These are milia, or trapped retention cysts of keratin.
If a patient has a blistering disorder and the blister heals with milia like this, then it suggests an underlying subepidermal blistering disease such as porphyria cutanea tarda or epidermolysis bullosa acquisita or a blistering fixed drug reaction.
Hence the presence of simple milia within a scar can help you diagnose more serious disorders. Milia are commonly seen as isolated lesions in the skin, especially on the face, and at all ages.