Diaphoresis may be associated with some abnormal conditions, such as hyperthyroidism and shock. If it is accompanied by unexplained weight loss or fever or by palpitations, shortness of breath, or chest discomfort, it suggests serious illness. Read more on Diaphoresis.
Hyperhidrosis is a condition characterized by abnormally increased sweating, in excess of that required for regulation of body temperature. Read more on Hyperhidrosis.
Hyperhidrosis is not considered a serious illness, it has no negative physical effects on the body. Diaphoresis, on the other hand, refers to a specific, narrowly defined, clinical disorder.