Helping a depressed teen involved spiritual and emotional support, firstly pray for God's guidance, hope and healing, ask God to be present in their problem.
Let the book of Philippians 4:6-7 be there daily scripture. Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God".
7-And the peace of God, which transcends all understanding, will guard your hearts and your minds in Christ Jesus".
Teach them how to lament, is a form of prayer that expresses sorrow and moves towards deeper trust in God.
Teach them about God's unconditional love and his acceptance, and tell them that it will make them to feel valuable and worthy despite their struggles in life.
Listen attentively to their feelings, and their experience without trying to fix them or advising them immediately.
Engage yourself in family activities like walks or other exercises to ease your depressed situation.
Create a safe environment for yourself, and always keep yourself busy to reduce unnecessary pressure.
Eat a healthy diet that is prepared at home and get enough sleep.
Depression is also a medical condition that requires professor treatment.