one of the major factors that can negatively affect breastfeeding is the lack of breast milk .
there are many instructions on the subject of breast milk in iranian traditional medicine resources .
this article attempts to investigate causes and reasons for the lack of breast milk from the perspective of the great scholars in this field .
this study reviews the literature based on the iranian traditional medicine . the literature review included traditional medicine resources and a survey of reputable databases using keywords such as  morzae  ,  sady  ,  pestan  ,  sheer  ,  sheerkhar  , and  hifzossehhe  .
according to the viewpoint stated in traditional medicine literature , the primary substance for milk production is blood that transforms to milk after crossing the breast glandular tissue .
the main causes of milk shortage can be classified into four categories , namely food - related factors , factors related to blood impaired , factors related to breast tissue and psychological and physical factors .
one of the main reasons for milk shortage is the impaired quality and quantity of food .
appropriate mizaj of breast tissue is required for adequate milk production as it develops sufficient ability to absorb and transform the substance into milk . on the other hand ,
the ability of breast tissue is greatly influenced by the main organs of the body , particularly the heart ; being the core of understanding psychological factors .
thus , psychological factors can have a significant effect on the process of milk production .
due to the importance of breastfeeding , reflection on other viewpoints , such as those mentioned in iranian traditional medicine , could pave the way towards new research areas .
 background : support for breastfeeding is a public health priority . 
 one of the major factors that can negatively affect breastfeeding is the lack of breast milk . 
 there are many instructions on the subject of breast milk in iranian traditional medicine resources . 
 this article attempts to investigate causes and reasons for the lack of breast milk from the perspective of the great scholars in this field.methods:this study reviews the literature based on the iranian traditional medicine . 
 the literature review included traditional medicine resources and a survey of reputable databases using keywords such as  morzae  ,  sady  ,  pestan  ,  sheer  ,  sheerkhar  , and  hifzossehhe  . 
 the content analysis was used after collecting data.results:according to the viewpoint stated in traditional medicine literature , the primary substance for milk production is blood that transforms to milk after crossing the breast glandular tissue . 
 the main causes of milk shortage can be classified into four categories , namely food - related factors , factors related to blood impaired , factors related to breast tissue and psychological and physical factors . 
 one of the main reasons for milk shortage is the impaired quality and quantity of food . 
 appropriate mizaj of breast tissue is required for adequate milk production as it develops sufficient ability to absorb and transform the substance into milk . on the other hand , 
 the ability of breast tissue is greatly influenced by the main organs of the body , particularly the heart ; being the core of understanding psychological factors . 
 thus , psychological factors can have a significant effect on the process of milk production.conclusion:due to the importance of breastfeeding , reflection on other viewpoints , such as those mentioned in iranian traditional medicine , could pave the way towards new research areas . 
 it could also steer policies towards an extra focus on breastfeeding by mothers . 
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