hi..Thanks for your query
The pustules you are talking about might be acne vulgaris
.Acne can present in several forms. This includes whiteheads, blackheads, and red, inflammed patches of skin (such as cysts).In the course of evolution, you may have any or all of these.This is caused by various internal hormonal
stimuli as well, which can change several times in.Onset during mensturaion shows a hormonal cause .You are nearing menopause
which points towards change in hormonal mileau of your system.
Do not use heavy/thick creams ..Use only gel based moisturizers/ sunscreen for regular use.U can use a cleanser containing Salicylic acid/ Glycolic acid
on a regular basis.Apply Clindamycin
gel on the acne eruptions for a faster resolution.
Hope this helps..Take care!