What to do if i breastfeed and lately a duct in my left breast keeps getting clogged?

Pressure/position: Sometimes a particular area gets clogged because we put pressure on it, for instance, straps from baby front carriers can do this for some sensitive women. Also, the way we hold baby to nurse them sometimes either doesn't drain one duct well or puts pressure. Make sure you are not pushing on the breast in that area with your hand or a tight piece of clothing.