How to treat alopecia areata: Topical Immunotherapy

Alopecia areata is the autoimmune disease that can lead to hair loss. Since this is an autoimmune disease, it is the body’s own immune system that is attacking the hair follicles. It sometimes appears as mild and patchy hair loss but if more than half of your head is affected, hair loss has reoccurred many times, hair loss has persisted for over a year or incidences of hair loss began in childhood, it is usually considered severe. Treatment can be difficult, especially in the more severe cases. There are currently no approved therapies as success rates have varied with individual cases but good results are possible1.

For these severe cases, topical immunotherapy is often used2,3. A sensitizing agent (usually diphenylcyclopropenone or squaric acid dibutylester) is applied to the scalp to cause an allergic reaction4. It is not completely understood why this reaction causes the immune system to stop attacking hair follicles although it is believed that the appearance of a new immune target or an increase in cells that regulate the immune response could be contributing factors5.

Be prepared for possible side effects which include a burning sensation, blistering, irritation, darkening of the skin, enlargement of the lymph nodes, itchy rash, facial swelling, redness6,7 and brown patches8. The second downside to this type of treatment is that relapses are not uncommon1.

Topical immunotherapy is usually not recommended for pregnant women9, use in eyebrows10 or for those with mild11 or rapidly expanding alopecia areata12. This treatment is also less likely to be successful in those with complete hair loss, those experiencing body hair loss, those that have experienced thyroid disease or those that have affected nails1,7,10. If you are interested in learning more about topical immunotherapy for your alopecia areata, speak with your doctor or hair restoration expert.

Article by: Dr. J.L. Carviel, PhD, Mediprobe Research Inc.


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