I had a very very dry scalp and doc prescribe some shampoo. It was very good and really helped. Now everytime i wash my hair it looks greasy after only 2 days. A month ago i could wash my hair and it would not look greasy for at least 4 days after.
Just added a photo of my hair . This was after it had Been washed and dried then brushed . My hair is very long . My hair only gets greasy quickly at the top . It stays fine at the bottom for longer