Chemically straightened hair needs regular deep conditioning treatments to restore moisture and shine lost during the relaxing process. The essential fatty acids in castor oil condition your hair by making it more supple and lustrous after hot oil treatments. You can also use castor oil when you massage your scalp and on your ends to prevent breaking and splitting. The best time to do castor oil treatments is at night before bed, but you can also use a little castor oil in the morning to seal in moisture on wet or dry hair.
Add 1 or 2 tbsp. of castor oil to a small heat-safe glass container. Place the container in a larger heat-safe bowl of hot water for five minutes to warm the oil. Divide your hair into four sections. Apply the oil along the length of your strands from the roots to the ends. Pile your hair on top of your head if it is long. Tie your hair in a silk scarf and allow the oil to penetrate overnight. Shampoo and condition hair in the morning.
Mix two or three drops of lavender essential oil with 2 or 3 tsp. of castor oil in a small glass container. Massage the warm oil into your scalp using the pads of your fingers. Apply gentle pressure to your scalp to promote stimulation. Cover your hair with a silk scarf. Repeat the process twice per week.
Pour approximately 1 tbsp. of castor oil into a small glass container. Apply a small amount of the oil approximately 1 inch at the ends of your hair. Tuck the oiled ends of your hair into a bun style to protect them. Repeat the process twice a week or as needed.
Work a cream or liquid moisturizer through your wet or dry hair. Pour three or four drops of castor oil into the palm of your hand. Rub your hands together, and then run them through your hair. Style your hair as desired.