Burns

• A hot comb is heated by sitting it on a hot stove burner for about 30 seconds on each side. If the comb is too hot, it can burn your hair or your scalp.
  
  

Dry Hair

• Hot combs aren't healthy for your hair because they can dry your hair out. You hair needs to be washed and conditioned (preferably with a deep conditioner) before straightening it.
  
  

Flammability

• The styling tool can ignite flammable materials that you use on your hair, such as hair spray. Your hair needs to be clean of such products before using the comb.
  
  

Comb Size

• You can only work on one small section of hair at a time with the comb, so straightening hair is typically a time-consuming process when using a hot comb.