It is important to minimize stress, especially when you first introduce your pig to a new environment. Some common diseases associated with stress are pneumonia, mad itch, and swine dysentery. Pigs can also get external parasites, such as lice and ... Farrowing sickness (MMA mastitis, metritis, agalactia) Lameness Porcine parvovirus. Vaginal discharge syndrome. Bladder infection (Cystitis) Kidney infection. Leptospirosis Erysipelas Gastric torsion. Gastric ulceration ...