Your cut is an entrance for unwanted bacteria into your bloodstream. Wash your hands with warm, soapy water before handling the area. Anti-infective or antibiotic creams and ointments are made to be used on superficial cuts and scrapes, but may not be appropriate for more severe injuries further up inside your nose. Ask your doctor if this product can be safely used to treat the cut inside your nose. Products like this can be purchased without a prescription at your local pharmacy. If your doctor approves, place a small amount of the anti-infective cream or ointment on the end of a cotton swab or on a small piece of gauze. Carefully apply the medicated cream or ointment to the area surrounding the cut. If you must use your hands to apply treatment, then be sure you have washed them thoroughly. Once you have applied the medication, leave the area alone. Keep your fingers away, and do not pick at the scab. Picking at the area can prevent the cut from healing and increase your risk of infection.  Gently cleaning the area and using a moisturizer safe for your nose may help to prevent the formation of large and uncomfortable scabs. Consider using the anti-infective ointment or a small amount of petroleum jelly or Vaseline to keep the area moist. This should help the cut to form smaller and softer scabs and help the area to heal on its own. Try using Nasya oil drops in your nose at night to soothe the area and promote faster healing. You can get these drops from an Ayurvedic medicine practitioner or a store that sells natural medicines and supplements. Depending on the placement of the cut, its length, and its depth, you may need to repeat the application of the medication every day, or every few days. Use caution so as not to introduce any bacteria.

TL;DR in Indonesian:
Cuci tangan sering-sering. Tanyakan dokter sebelum memberikan produk apa pun ke dalam hidung. Hindari menyentuh luka dengan jari. Jangan mencungkil luka. Ulangi perawatan sesuai kebutuhan.