see if you want a good solution you have to meet a dermatologist. Because without seeing you or examining no doctor will be able to prescribe the right medicines. However time being you can try 8x shampoo 3 times weekly. And also dandruff is a tendency of your scalp so u need to use the appropriate shampoo on a regular basis. You can now use it 3 times a week and when its in control you can make it once a week and other days you can use a normal shampoo of your choice.