Both are bad. You need your ammonia and nitrate to be at 0ppm. If this is a cycled tank, it is still cycling and experiencing a dangerous ammonia spike. You should do a partial water change to remove some of the toxins. Those levels are unsafe for fish to live in.
If this is an unfiltered bowl, changing the water will bring you back down to 0ppm for everything. (and I would recommend you do so more often)
Hope that helps~