The heart or 4th chakra is the centre of of love, affection, compassion, acceptance, optimism, joy, generosity, empathy, kindness, trust and forgiveness for yourself and others.

When out of balance you may feel depressed, anxious, jealous, lonely, deep sorrow and grief, isolated, bitter and insensitive.  You may lack trust, compassion, self-respect and self-love, fear intimate relationships, be unable to forgive yourself or others, have unhealthy relationships where you are unable to love, love too much, lack boundaries or are a people pleaser.

Some questions to consider and perhaps journal about.
Do you always put others first?
Are you able to express your true emotions?
Do you find it difficult to connect with others?
Do you fear intimacy?
Do you believe you are worthy of love and being loved?
How do you show your love to those around you?
Do you find it easy or difficult to forgive others who have hurt you?
What do you love about yourself?
How often do you allow yourself to feel vulnerable?

10 essential oils that can help with heart chakra issues
Bergamot (Citrus bergamia) helps release pent up anger and frustration that can lead to depression when you feel unsupported or insecure.
Cinnamon (Cinnamomum zeylanicum) is useful if you have isolated yourself emotionally from others.

Cypress (Cupressus sempervirens) eases feelings of loss particularly of a person and enhances feelings of compassion.

Elemi (Canarium luzonicum) is very calming, centring and grounding, offering support and strength when you need to reconnect with yourself and others.

Jasmine (Jasminum grandiflorum) relieves emotional pain and promotes trust and unconditional love.

Lavender (Lavendula officinalis) helps to ease frustration and irritability, nurtures you and allows you to forgive yourself for neglecting yourself and others in the past.

Lime (Citrus aurantifolia) eases feelings of agitation, turmoil and stress calming you down and allowing you to explore your emotions and deal with challenging situations calmly.

Palmarosa (Cymbopogon martini) can help if you have a tendency to be clinging, possessive or jealous and find it hard to let go of loved ones. She can also ease feelings of betrayal and allow you to forgive the betrayer and yourself for being betrayed.

Rose (Rosa damascena) restores a sense of security and well-being especially if you have suffered rejection, loss or abuse. She helps you to forgive others as well as yourself and experience more honest and meaningful relationships.

Ylang Ylang (Cananga odorata var. genuina) eases the fear of intimacy, especially if you experienced rejection in the past and calms jealousy by helping you to feel more lovable.

Make your own heart chakra anointing blend
Choose 1-3 essential oils for a total of 3 drops and add to 10 mls of cold pressed vegetable oil.
Anoint the heart area with a few drops of the blend in a heart-shaped movement with your fingertips. Use your intention to open, balance, heal and then close the chakra.

6 Green and pink crystals that may be used to balance the heart chakra. 
Amazonite allows you to express your heart and truth through your voice, set boundaries and to overcome your fear of conflict.

Chrysoprase helps you feel and express love as well as releasing attachment to fear based emotions and belief systems. She can also help you heal from abuse.

Green fluorite dissipates emotional trauma, cleanses and heals the heart chakra and ensures that the mind and heart are in agreement.

Kunzite helps open your heart to love in all its forms and encourages you to release your fears and enjoy life.

Rhodochrosite is helpful for healing deep emotional trauma that has left you unable to feel joy or express your creativity.

Rose quartz helps release, worry, fear, anxiety and past emotional trauma.