January 2008 in “Journal of The American Academy of Dermatology” Hair loss affects 20% of people, more in men and those over 35, and is often associated with a sensitive scalp.
About 17% of people in France have dandruff, and those with dandruff are more likely to have sensitive and itchy scalps.
January 2008 in “Journal of The American Academy of Dermatology” A nonchemical lotion was found effective in killing head lice and their eggs in most people, indicating it could be useful for managing head lice.
A man's scalp hair loss was due to a combined melanocytic nevus and alopecia areata, suggesting a possible link between the two conditions.
April 2012 in “Journal of the American Academy of Dermatology” Dermoscopy can help diagnose tinea capitis in children by looking for comma hairs, black dots, and broken hairs with white bands.