The COOL, OILY HEAVY  qualities  of late Winter cause potential disturbances of phelgm to be stored, but they are concealed by the cold and thus do not arise.  The warmth of the sun in Spring causes them to arise, and the LIGHT and ROUGH qualities of early summer pacify them.

Time of accumulation - late Winter 
Time of manifestation - early Spring 

Winter cold and damp leads to acculumation of Phelgm, warmth of Spring melts the Phelgm and condition is manifest.

Internal and vessel organs formed out of EARTH element
Flesh/Bones - METAL element
Blood/Water/Heat - FIRE element
Veins and Arteries - WOOD element

Atmospheric change affects or body.   Seasonal changes affect body. Change of body is seen in the PULSE.

• Spring    -  lower Gall Bladder/Liver   - WOOD
• Summer  - Heart/ small Intestine         - FIRE
• Autumn  - Lungs/large Intestine          - IRON
• Winter    - Kidneys/ Urinary Bladder  - EARTH

• Winter, cool and damp, BADKHEN accumulating time