The skin of the hand consists of a thin living layer, and a thick, non-living, horn layer. In the two weeks that the area is covered with a band aid, the horn layer no longer wears off. This results in two hard patches hinging at the scar at every movement of the hand.
After removing the sutures, the plates of horn layer separate, perhaps giving the false impression that the wound is opening up. Moreover, some smutty liquid, which accumulated between the living skin and the horn layer, may be released . A real fissure may develop in the scar.
If this happens, it is best to wash the hands with disinfectant soap several times a day. It is advised not to continue using band-aids, or the horny layer of skin cannot wear off and will maintain the fissure. When in doubt, please consult a doctor.