Moms who experience medical conditions that cause low milk supply such
as previous breast surgery or hypothyroidism can continue to nurse, but make sure their baby receives enough to eat by also supplementing with formula according to Very Well.
However, if you have a true low
breast milk supply
as a result of certain
breast conditions, a
previous breast surgery, the return of your period, stress, smoking, hypothyroidism, or other health problems, you may have to give your baby a supplement.