Mental wellbeing in Vedic astrology is primarily governed by the Moon (Chandra) as the Manas Karaka — the planet of mind, emotions, and psychological patterns. A strong, unafflicted Moon in the natal chart is the foundation of mental stability and emotional resilience.
The 4th house (Sukha Bhava) represents inner peace, contentment, and psychological foundation. When the 4th house is afflicted by Saturn or Rahu, anxiety, restlessness, and lack of inner peace can become persistent patterns.
Mercury (Budha) governs the nervous system and rational thinking. Mercury afflicted by Mars creates anxiety and overthinking. Mercury with Saturn creates chronic worry and negative thought patterns. Specific Mercury mantras and Wednesday fasting are classical remedies.
Kemadruma Yoga — formed when no planet occupies the 2nd or 12th house from the Moon — creates psychological isolation and mental vulnerability according to BPHS Chapter 36. Benefic planets aspecting the Moon counter this yoga's effects.
The Moon's Nakshatra at birth reveals fundamental psychological patterns. Ashlesha Nakshatra Moon creates intuitive but anxious minds. Rohini Nakshatra Moon creates emotional stability and contentment. Jyeshtha Nakshatra Moon creates a responsible but sometimes overburdened mental state.