Usually, if there are lice on the head there can be symptoms of red, itchy scalp, and can be found dark red or black bugs, or pale white eggs. 1. If there are fleas on the head, flea bites on the scalp can trigger an inflammatory reaction, resulting in a red, itchy scalp. 2. Fleas are tiny, with white larvae, red or black adults, and white eggs, all of which can be combed out when using a comb to comb the hair, or seen under a microscope. If you are aware of fleas on your head, you need to wash your hair regularly to keep it clean and dry, and you need to wash and disinfect your clothes and bedding regularly. If you are still not sure whether there are fleas, you can go to the hospital for examination, the doctor can determine whether there are fleas through the microscope observation, the treatment can be under the guidance of the doctor to use compound sulfur cream to wash the hair.