If there is a similar situation in future it is ok to use some types of cream. If you put sudocreme / bepanthen/ savlon / certain itch relief creams in the fridge then apply them when it is really itchy then they can be helpful without causing a problem. It's also possible to use vaseline. Once the stitches are out there will probably be more itching again any of the above can be used.
It is also possible to get lanacane over the counter which is designed for hemorrhoids but stops things from itching. It contains a very mild anaesthetic (does not numb skin) so tends to last longer, but it also stinks and sticks around for a long time.
But obviously if there are ever any steri-strips in the same are no creams are advisable