Should I do warm or cold compress when I have a blocked duct?

My masseur who did my post natal also recommended me to use a warm towel, best if I can put a warm towel on my boobs every 2-3 hours. However, prevention is better than cure so be sure to breastfeed often and to empty out your boobs via pumping to prevent it from occuring again! http://www.drugs.com/cg/breastfeeding-and-plugged-ducts.html

Warm compress to soften the breats before you pump out the milk. I soaked a small towel in hot water and compress it on my breasts. It works everytime when I have blocked duct.

Warm compress - use a warm towel soaked in hot water

Warm compress