Nutmeg and mace are different spices from a single nut actually, the outer layer or the skin of nutmeg is covered by mace (a flower). They are known for their medicinal values. Countries which produces nutmeg and mace are Indonesia, India, China, Srilanka and South America etcâ?¦. it is used to prevent diarrhoea, kidney disease and other stomach problems. In Siddha medicine, nutmeg powder is said to stop the infantâ??s cry and induce sleep in them