Thanks for writing to us.
Application of vitamin c
serum and retinol or tretinoin
creams are said to give good results post micro needling sessions as these help in collagen synthesis. However it is not necessary that each and every doctor will advocate their usage necessarily after needling sessions. Micro needling too works by the same principle of collagen synthesis.
Post needling hydrocortisone
was advised to prevent development of any infection and inflammation as it is an invasive procedure.
You may use vitamin c and retinol to have better results.
Hope that helps.