Seborrheic dermatitis. This condition!

Hello Doctors I was diagnosed with Seborrheic dermatitis of Scalp 5 yrs back . Consulted a dermatologist , took proper medication and followed his advice . I did all the treatment which he has suggested . But the condition was still same . My scalp gets oily after 1 day of washing , followed with itiching and white flakes and small pimple like things  which when touched excretes water and oil . The hairfall is massive . I researched on my level that this condition cannot be successfully treated but can be managed . But the question is the management is also not possible with Allopathy. I am frustrated with this condition tried all possible ways and now genuinely looking for a effective treatment Please doctor advise me with some effective and tested treatment for this condition Thanks in advance for your advice and suggestions