I know you aren't supposed to drink the tap water in Mexico.
What about washing a cut with tap water?
If I shower, tap water will get into the cut.
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Sign up to join this communityAn open cut can easily be infected even without showering. Apply antibacteriological ointment and a plaster in any case. If showering, make that a waterproof plaster.
If you want to wash a cut, use a sterile wipe.