Although baking soda is best known for his role as leavening agent, which is also used in recipes for skin care. It is known to help in clearing acne. Baking soda or sodium bicarbonate is known for its mild antiseptic property, which makes it a suitable agent to kill bacteria that cause acne. Baking soda also acts as a drying agent for excessive oily skin. By absorbing the excess fat from the skin, which helps minimize clogging the pores, triggering acne breakouts. When applied on acne, it helps dry pus-filled blisters on the skin, thereby helping in cleaning the drain in a short period of time.
to fight acne, you can use baking soda in the following forms
1. Sodium Bicarbonate Paste
The easiest way to eliminate acne is to apply paste of baking soda in grains. Make a thick paste by combining some baking with the same amount of water. Cover acne with pasta. Let paste baking soda dry. Rinse with warm water. 
2. Baking soda and honey
Mix honey with a little baking soda. Apply the paste of baking soda and honey acne. Leave it on for about 10 minutes then rinse. Honey is a natural antibiotic. This helps in the destruction of harmful bacteria responsible for the breakdown. 
3. Baking soda and lemon
Extract the juice of half a lemon. Dip a cotton ball in lemon juice and apply on acne-prone areas. Leave the juice on the skin until the skin starts to feel sticky and dry. Now dip a cotton swab dipped in a little baking soda and apply in areas where had applied lemon juice. Leave on for a few minutes and then rinse. This remedy helps clear acne discoloration and acne scars. 
4. Baking soda and apple cider vinegar
A mask prepared by combining baking soda and apple cider vinegar helps in clearing acne. Mix ¼ cup of baking soda with salt ¼ cup fine sea, ½ cup honey and ½ cup apple cider vinegar. Add 10 drops each of tea tree oil and calendula oil. Mix well the ingredients and apply the mixture on the face. Leave on face for several minutes and then rinse. Apply every day for a week to clean acne. 
5. Baking soda and oatmeal
Mix ¼ cup baking soda with ½ cup of oatmeal. Add two tablespoons of honey and ½ teaspoon cinnamon. Mix ingredients well and apply on acne-prone skin. Leave on for 15 minutes, then rinse.