Polyhydramnios symptoms result from pressure being exerted within the uterus and on nearby organs. Mild polyhydramnios may cause few — if any — signs or symptoms. Severe polyhydramnios may cause: 
Shortness of breath or the inability to breathe
Swelling in the lower extremities and abdominal wall
Uterine discomfort or contractions
Fetal malposition, such as breech presentation
 Your health care provider may also suspect polyhydramnios if your uterus is excessively enlarged and he or she has trouble feeling the baby.