TLDR Fat grafting before FUE hair transplantation effectively treats scalp scars.
The narrative literature review concluded that a two-stage hair transplantation technique, involving prior fat grafting followed by hair transplantation using the Follicular Unit Extraction (FUE) technique, was effective for treating scalp scars. This conclusion was based on data collected from studies in the Medline, Lilacs, and IBECS databases, and included references to research on mesenchymal cells in adipose tissue.
September 2021 in “PubMed” Hair transplantation is effective for treating scar-related hair loss on the head and neck.
August 2018 in “Analysis of the application of various variants of bone plasty in victims with intraarticular fractures (Transplantology)” 
22 citations
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January 2017 in “Indian Dermatology Online Journal” Body hair transplants can treat baldness but differ from scalp hair and need more research on long-term results and side effects.
20 citations
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July 2008 in “Dermatologic Therapy” The document says that treating the root cause of hair follicle damage is crucial to prevent permanent hair loss, and treatment options vary.
14 citations
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February 2002 in “Dermatologic Surgery” Best hair transplant results happen when tissues are least damaged.
37 citations
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May 1999 in “Australasian Journal of Dermatology” Early diagnosis and treatment are crucial for preventing permanent hair loss in various scalp conditions, and while new treatments are promising, more research is needed to evaluate their effectiveness.
