Answer:
You can use many home made recipes
1) if you used a shaving stick dispose it
2) use Aloe vera juice on the affected area to reduce inflammation and it also confers healing to acne and dark spots
3) use raw tumeric powder to form a mask with either water or honey, or you can use soap rich in tumeric and/or creams and oils.
4) if you are light skinned you can use an exfoliating soap and/or toning or lightening soap as cream
All these will take time to work so patience and consistency is key.
Hope this helped