porcupine puffer acting funny

[ws6envy]

getting red/brown spots on his cheeks and swimming erratically...pics below.
https://forums.saltwaterfish.com/data/4/4a/4a07d7c4_vbattach186464.jpg
https://forums.saltwaterfish.com/data/a/a2/a2e9ee52_vbattach186465.jpg