Separation anxiety is babies' common and normal fear of being away from their parents or people who take care of them. The behavior that might be expressed when babies are separated from parents is sometimes called "separation protest." Babies from about six or eight months can remember you when you are not around because they gain sense of object permanence. Separation anxiety reaches its peak in 14-18 month-old babies.They may cry because they want you. Sometimes babies will wake up at night or will be harder to put to bed as they miss you and don’t understand you always come back. 

These anxieties are a normal part of development and it's not concerning at all. 

The signs of separation anxiety often includes:

• Increased clinginess;
• Crying when parents/caregivers are not around;
• Resistance to being put down to bed;
• Increased number of wake-ups at night/early wake-ups in the morning;
• Not willing to be hold by someone else;

You can help baby develop trust in you by:

• Letting them know when you are leaving - wave good-bye and let them know when you are back. Don't sneak out;
• Playing games like peakaboo to help them get used to you leaving and coming back home. These types of activities help babies understand that things that go away come back;
• Giving them something that reminds them of you. This can be an item that have your scent;
• Leaving them with people who they know well and feel safe with;