After Anwar’s episode of The Bumpinator, Dr. Sanusi Umar received a question from Lucas in Brazil about acne keloidalis nuchae. Lucas had noticed that his AKN lesions seemed to flare during the summer and wanted to know whether heat and sweating were making the condition worse. Dr. Umar’s answer draws an important distinction between heat itself and skin injury caused by too much sun exposure.
Lucas Asks About Summer AKN Flares
Lucas’s question was direct: “Does heat and sweating make AKN worse? I notice mine flares up during summer.” Dr. Umar restated the concern by noting that Lucas has AKN and has observed his lesions flaring during the summer months.

Heat Is Not Necessarily the Direct Cause
Dr. Umar explains that the relationship is not necessarily direct. He points instead to what can happen when heat involves substantial sun exposure. Just as too much sun can cause a sunburn, that exposure can become a form of injury to the skin.
“That would be, you know, a kind of injury,” Dr. Umar explains. In that situation, he says a person may expect some flaring of the existing condition. For Lucas, this could help explain why the lesions appear more active during summer.

Why the Distinction Matters
The answer keeps the focus narrow: heat alone is not presented as the direct explanation for every flare. Instead, Dr. Umar identifies excessive sun exposure and the resulting skin injury as a possible factor when existing acne keloidalis nuchae lesions flare.
That distinction is especially useful for questions about treatment for acne keloidalis or how to treat bumps on the back of the head because it separates a seasonal observation from a specific explanation supported in this Q&A. Dr. Umar closes by telling Lucas that this may be the situation he is dealing with, while avoiding a broader claim about every AKN case.
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Medical disclaimer: This content is provided for educational purposes only and does not replace individualized medical advice. Individual conditions and responses vary.
Further Reading
- https://dru.com/keloid-removal-services-los-angeles/
- https://dru.com/anwars-journey-continues-new-path-without-razor-bumps/
- Umar, S., & Sila, C. R. (2021). Acne keloidalis nuchae: A role for low-dose radiotherapy. JAAD Case Reports, 13, 90–93. https://doi.org/10.1016/j.jdcr.2021.05.008



