Why do I feel physical chest pain when repeating Metta phrases to myself?

Namaste Ananya. The body never lies; that "knot" is a physical map of an emotional boundary. Born March 14, 1989, in Noida, you have a Sun-Ketu or Moon-Ketu influence. Ketu represents "Karmic Knots." When you repeat Metta phrases to yourself, your Anahata (Heart) Chakra is trying to expand, but it is hitting a wall of "Anxiety-Armor." The pain is a psychosomatic manifestation of your internal refusal to be vulnerable, even to yourself. Detailed Solution: The physical pain is a sign that your "Protective Layer" is very thick. The Softening Approach: Don't repeat the phrases into the pain. Visualize the pain knot as a clump of ice and your Metta phrases as warm sunlight. Don't try to break the knot; just let the light sit near it until it melts naturally. Detailed Remedies: Remedy: Apply warm Sandalwood oil to the center of your chest before meditation. Breathing: Practice "Heart-Centered Breathing" (inhaling through the heart, exhaling through the heart). Mantra: Chant the seed sound "YAM". This is the frequency of the heart chakra and will physically vibrate the knot loose