Eruptive Pustules

Transmutation [acid]
Level: Alchemist* 3, Artificer * 3, Bloodrager * 3, Sorcerer */Wizard * 3, Warlock * 3
Components: V, S
Casting Time: 1 Standard Action
Range: personal
Target: you
Duration: 1 minute/level (D)
Saving Throw: Fortitude partial, see text
Spell Resistance: yes
  Your skin erupts in swollen, pus-filled bumps that burst open if you are struck. Any creature that strikes you with its body or a hand-held weapon deals normal damage, but at the same time the attacker takes 1d6 points of acid damage and must save or be Sickened for 1 round. If the attack against you is a critical hit, the attacker must save or be Nauseated instead of Sickened. This damage can harm a swarm.