As per Shastra’s :

।। चतुर्दश्मुखश्चाक्षो रुद्रनेत्र समुद्भवः सर्व-व्यधिहश्चैव सर्वारोग्य प्रदायकः ।।
श्री मद देवीभागवतम स्क ११, अ. ७, श्लोक ३१९

Fourteen Mukhi Rudraksha is derived from the eyes of Lord Rudra. It removes all obstacles and offers total health.

Sri Mad Devi Bhagavatam, Chapter. 7, Shloka. 319

Essence of Fourteen Mukhi Rudraksha:

14 Mukhi Rudraksha bead is referred to as Deva Mani or Maha Shani in the Shastras. When tears fell from the eyes of lord Shiva it is believed that the 14 Mukhi originated from the tears that fell from his third eye. This divine bead is therefore called as the controller of the third eye/Ajna chakra. This Chakra is located in between the eyebrows and is the seat of intuition. Thus, the wearer of this Rudraksha is blessed with an intuitive mind for making sound judgements. This helps him / her to execute any plan or action and achieve success in the endevours.

As per scriptures, This Rudraksha improves the present, it sublimates the sins of past karmas right and bestows a positive, bright future. He is also blessed with supreme decision making skills that ensure success. This Rudraksha helps the wearer procure the grace of Lord Shiva and Lord Hanuman. Lord Shiva is addressed as “Omkaara Bindu Samyuktam” and “Mahadev” (God of Gods).