Citrus Fruits. Citrus fruits, particularly lemons, which contain vitamins A, B and C as well as calcium, phosphorus, potassium and fiber, are blood-cleansing foods.
Another great way to reduce oil production in the scalp is by breaking up the grease before it gets into your body. To do this, every morning drink 1 pint of warm water with the juice of 1 lemon squeezed in. Add to this 1 pinch of himalayan salt, and half a teaspoon of cayenne pepper.
1 Take few drops of tea tree oil and mix it any carrier oil. 2  Apply this on the scalp, but focus more on the acne spots. 3  Leave it like that for overnight or for few hours.  Wash it off with shampoo that contains tea tree oil like kiehlâs tea tree oil shampoo or Jason tea tree oil scalp normalizing shampoo.