By itself, just like using gel on hair, styling wax doesn't have any particularly negative effects, but it can cause some problems if not handled correctly
Since hair wax majorly dehydrates your scalp and hair, it is better to limit the usage to your hair only.
Do not apply the product to your scalp. Using hair wax directly on your scalp clothes the hair follicles and does not allow them to breathe. It interrupts hair growth.