Really can't say from looking at photos. The best way I know to confirm spider mites are causing a problem is to get a sheet of blank white paper and turn the plant sideways over it, then tap it or give it a gentle shake. Then look at the paper. If you see tiny dots moving around on it and running for the edges, you've got mites.

Oedema - from over-watering and soil holding too much water for too long.

Al