complication

noun
C1+
1
C1+
a thing that makes a situation more complicated or difficult
پیچیدگی, دشواری
2
a new problem or illness that makes treatment of a previous one more complicated or difficult
عوارض, مشکل جانبی, عوارض بیماری
She developed complications after the surgery.
Infertility is one of the complications of this type of radiotherapy.