PHP - Php And Mysql, I Get Duplicate Values Even If There Is No Duplicates On Db

while ( $categories = $category_result -> fetch_assoc() )
 {
   $menu_sql = "select * from menu where category_id = {$categories['category_id']}";
   
   $menu_result = $handle -> query( $menu_sql );
   
   $category2 = strtoupper($categories['category']);
   
   echo '<h3 id="' . $category2 . '">' . $category2 . '</h3>';
   
   
      while ($menu = $menu_result -> fetch_assoc())
      {
         
         echo $menu['item_name'] . ' ';


         $size_sql = "select distinct size from size where category_id = {$categories['category_id']} order by size desc";
         $size_result = $handle -> query( $size_sql );
         
         while ($size = $size_result -> fetch_row())
          {
            echo $size[0] . ' ';
         }
         
         //get base type from base_type table for the pizza category
         $type_sql = "select type from base_type where category_id = {$categories['category_id']}";
         $type_result = $handle -> query( $type_sql );
         
         while ($type = $type_result -> fetch_row())
          {
            echo $type[0] . ' ';
         }         
         
         
         //get price for each item from menu if it is not null   
         $price_sql = "select price from menu where item_name = '{$menu['item_name']}'";
         $price_result = $handle -> query( $price_sql );
         
         while ($price = $price_result -> fetch_row())
          {
            echo $price[0] . ' ';
            
            if( is_null( $price[0] ) )
            {
            //get price from size table if price is null in menu table;

                    //$categories = $category_result -> data_seek(0);               
               
               $size = "double";
               $category_id = $categories['category_id'];
               $item_id = $menu['item_id'];
               $type = 'deep';
               
               echo $menu['item_id'];
                   
               
               $price_size_sql = "select price from size where size = '$size' and category_id = $category_id and item_id = $item_id";
               $price_size_result = $handle -> query( $price_size_sql );
               
               while ($price_size = $price_size_result -> fetch_assoc())
               {
               
                  echo " {$price_size['price']} ";
                  
               }
            }
            
         }         
                     
         echo '<br />';
      
      }
    echo '<br />';
 }


I get duplicate vakues for $category_id = $categories['category_id'];
               $item_id = $menu['item_id'];

dont know whats wrong it works for pizzas but not burgers, please help me.