Mycoplasma hyopneumonia is a cause. Symptoms are coughing at two to three weeks of age, thumping and breathing hard and death usually results. Clean quarters can help but consult your veterinarian. Symptoms include lose of embryo, also mummified pigs and sows do not come in heat. Consult your veterinarian for prevention.
Symptoms are high fever, depression, nervous system disorders, padding and cough and convulsions.
Consult your veterinarian for treatment. This is a skin disease and the cause if not known. Symptoms are skin reddening and pimple-like formations, skin becomes thick and crusted and can affect the entire body. Consult your veterinarian for treatment and prevention. This cause is unknown but it is thought to be a virus.