However, it is mostly sold as cream and its main use is for treating athletes foot, jock itch, and ringworm. Coal tar
Coal tar causes the skin to shed dead cells from the top layer and slows skin cell growth. Essential oils
Essential oils, such as tea tree oil (for composition, see ISO 4730:2017), are found to be effective in the treatment of dandruff, but more research is required. Etymology
According to the Oxford English Dictionary, the word dandruff is first attested in 1545, but is still of unknown etymology. References


== External links ==
Infantile neuronal ceroid lipofuscinoses (INCL) or Santavuori disease or Hagberg-Santavuori disease or Santavuori-Haltia disease or Infantile Finnish type neuronal ceroid lipofuscinosis or Balkan disease is a form of NCL and inherited as a recessive autosomal genetic trait. The disorder is progressive, degenerative and fatal, extremely rare worldwide – with approximately 60 official cases reported by 1982, perhaps 100 with the condition in total today – but relatively common in Finland due to the local founder effect. Presentation
The development of children born with INCL is normal for the first 8–18 months, but will then flounder and start to regress both physically and mentally. Motor skills and speech are lost, and optic atrophy causes blindness. A variety of neurological symptoms, such as epilepsy and myoclonic seizures, appear. The senses of hearing and touch remain unaffected. The average lifespan of an INCL child is 9–11 years. Causes
It has been associated with palmitoyl-protein thioesterase. Diagnosis
Treatment
Treatment is limited. Drugs can alleviate the symptoms, such as sleep difficulties and epilepsy. Physiotherapy helps affected children retain the ability to remain upright for as long as possible, and prevents some of the pain. Recent attempts to treat INCL with cystagon have been unsuccessful. See also
FAIDD (The Finnish Association on Intellectual and Developmental Disabilities)

References
External links

GeneReviews/NCBI/NIH/UW entry on Neuronal Ceroid-Lipofuscinosis
An overview (in Finnish)
The INCL organization of Finland (in Finnish)