Thank you very much for the useful information.
This is variable.
Depends upon the depth of the wound, any infections hitting that area, treatment taken, generalized well being of the patient.
In genera, a minor laceration should heal completely with in 2-4 weeks.
However, if this does not, it may require suturing (stitching) which helps fill in the gap between the two margins of the skin (which allows it to heal rapidly).
If not already, there is no harm in getting this examined by your doctor (primary care physician) and let him determine if this needs suturing/antibiotics etc.
Keep the affected area dry and clean meanwhile.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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