if that is the best you can do then please keep the open area covered with a very clean dressing until the packing has been removed and it has healed. pilonidal cysts tend to be "germy" anyway so any progressing of redness swelling or pain should be promptly evalated by someone with medical knowledge.
i'm in an underdeveloped country & had a pilonidal cyst lanced & packed. is a bandage adequate protection from germs?