Hello dear , hi
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I have evaluated your query thoroughly .
*  This seems respiratory infection with skin lesion over 
scalp .
*  Suggestions for better  recovery
-  Gargles with salted lukewarm water added peppermint oil 3 times  a day
-  
Tessalon pearls  with  mucinix  od   will help .
-  Avoid 
smoking , exposure to dust , pollen containing  atmospheres .
-  Consult later doctor if requires .
*  Scalp lesion seems sebaceous 
cyst most likely , keep it clean with 
    antiseptic  liquids , dry .
    Better  if  you attach a photo pic to evaluate it more  precisely .
Hope this will help you for sure .
Wishing you fine health ahead .
Welcome for any further guidance .
Regards dear take care .