growing pains

Từ điển Oxford Advanced Learner 8th

ˈgrowing pains [growing pains] BrE NAmE noun plural
1. pains that some children feel in their arms and legs when they are growing
2. emotional anxieties felt by young people as they grow up
3. problems that are experienced by a company when it begins operating but that are not likely to last
•Every business experiences its share of growing pains.