Hi Lam how are you ? ,hyper pigmentation during pregnancy
is caused by higher Melanocyte
stimulating hormone level ,and it is very common phenomena ,if your are not getting rid of it you may opt for Glycolic Acid
peeling it is very safe and good treatment for melasma
small pore over face and freckle under the hands of experienced dermatologist
.you should always put on sun's cream . The sun's cream must has SPF 50 + good nutrition and use of citrus fruit juices can produce magic .
take care and have bright and nice face ................. Bye Dr.Prakash Roy