My husband has Parkinsons, but tonight he said he felt cold then about half an hour later he started to shiver really uncontrollably, he has no temperature, i put him to bed and gave him his slow release madopar and now a paracetamol , the shivering seems to be getting less and his hands and knees are beginning to warm up, is it his Parkinsons or something else, i worry about chest or water infection.