HI,thanks for writing here.Cat bite or any other animal bite always leads to secondary infection .In your case infection is skin deep leading to cellulitis
and it always requires higher antibiotics like augmentin
.Augmentin disturbs normal intestinal flora leading to diarrhea
,and it will subside once you stop the drug.You can take lactobacillus
suppliment with multivitamins ,also take antacids for control of nausea .Always take full course of antibiotics as prescribed by your doctor.You can just apply ice over puffy area to reduce swelling.