Pat Bucknell asks for input for a colleague not on LN.
This does not sound like dilation to me, sounds like Raynaud's, which is vasospasm with dilation and constriction.  Seen often after prolonged soreness/painful feeding. Would be very surprised if cold was helpful, would sooner try heat myself.
The vasoconstriction could impede flow - as could pain bad enough to inhibit MER.  I'd look in baby's mouth and carefully watch jaw/cheek/lip action during a feed to try to identify any factors that are causing the pain and the vascular reaction.
Rachel Myr
Kristiansand, Norway, thinking of all of my friends in the path of Sandy and hoping the forecast has been erring on the side of extreme caution

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