Apply vaseline petroleum jelly regularly

just apply coconut oil with camphor mix warm daily at night as no head or motorcycle cannot work without oil in long run

Seborrhoeic dermatitis/ blepharitis is a severe form of dandruff... rather dandruff is a milder form of seborrhoeic dermatitis. Recurrent seborrheic dermatitis is a tendency . so you will have to maintain your skin to be free from it. So go back to your dermatologist and understand the nitty gritty of the condition and how to control it in the future. This will benefit you the most rather than a search for a cure because it is difficult to change a tendency. Do not get worried. That aggravates the condition.