#11 They cannot calm down their mind
They try to keep calm but somehow they are never able to calm themselves down. Even the most trivial things get them worked up and anxious.

#10 Hide their mood
They are best at hiding what they feel at the moment. You would never be able to guess their mood by looking at them

#9 They search for meaning
They people always search for meaning in their lives and are never able to get it. They are always surrounded by an existential crisis.

#8 Irregular sleeping patterns
Depression is often clubbed with Insomnia or sleeplessness, either they sleep all day long or do not sleep at all.

#7 They are pessimistic
While I say they have a very negative outlook towards life, it is also important to mention that it is not by choice, they just can't see the brighter side themselves.

#6 Abandonment issues
These people also maintain a strange distance from other people because they feel they'll be left out.

#5 They try to help themselves
They do a whole lot of things to get themselves out of it, exercising, listening to music, painting, singing, anything that works for them

#4 They love cover-up stories
They always have cover-up stories for their strange behavior, they always have an excuse for everything they do

#3 They Want Your Help But Do Not Ask It
They certainly want someone to help them get out of their zone but somehow they never ask it themselves. Hence, it is important to be there for these people, build a friendship and then help them get out of it.

#2 Changed eating habits
Their eating habits also get altered, either they eat too much and gain excessive weight in short span of time or they don't eat at all and lose a tremendous amount of weight.

#1 They're Always Engrossed In Work
These people don't keep themselves off work just because they don't want their mind to start thinking about zillions of thoughts. Hence, they are always busy with one thing or another.