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PLLA injections can cause hair loss and skin issues.

This study evaluated androgen-induced hair loss and anagen induction mouse models, finding that Minoxidil and Pyrilutamide significantly promoted hair growth by decreasing androgen receptor protein levels and enhancing the Wnt/β-Catenin signaling pathway, supporting their use in studying novel treatments for androgenetic alopecia.

This review discusses the possible materials used in subcutaneous injections for alopecia, but it reports no new clinical results and highlights the need for further research.

This case report describes a rare occurrence of injection site reactions in a 77-year-old woman with eosinophilic fasciitis using subcutaneous methotrexate, marking the first documented instance in this patient population.

This study found that both superficial cryotherapy and intralesional corticosteroid injections significantly improved hair growth in patients with alopecia areata, with similar efficacy between the two treatments, establishing cryotherapy as a simple and noninvasive treatment option.

This study found that cyclophosphamide treatment in cashmere goats significantly increased cashmere yield by inducing shedding without affecting fiber length, with a 20 mg/kg body weight dose being optimal for hair removal and regrowth.

This study found that using minoxidil 2% as a mesotherapy injection showed more significant improvement in treating androgenetic alopecia in female patients than topical application.

This study observed that COVID-19 is associated with accelerated androgenetic alopecia, and platelet-rich plasma treatment showed improvement in hair loss after infection.

In this case report, a 35-year-old man developed avascular necrosis after receiving intradermal corticosteroid injections for alopecia areata, marking the first documented instance of this side effect from such treatment.

This study found that intralesional Vitamin D3 injections were comparable in efficacy to intralesional triamcinolone for patchy alopecia areata, with a non-significant trend towards better outcomes and fewer local adverse effects.

This study found that intradermal polynucleotide injections were linked to improvements in the appearance around the eyes and increased patient satisfaction, with minimal adverse effects, suggesting potential for further research to validate efficacy and optimize treatment protocols.

In this randomized controlled trial, both Botulinum Toxin-A and Triamcinolone Acetonide showed substantial effectiveness in treating patchy Alopecia Areata, but Botulinum Toxin-A avoided complications while Triamcinolone led to skin atrophy in 16.7% of patients.

In this randomized study, intradermal injections of dutasteride effectively improved androgenetic alopecia in 15 male patients, showing significant clinical improvement within one month and being well-tolerated without notable side effects, though the improvement was negatively correlated with longer disease duration.

This study found that intralesional vitamin D3 injections significantly increased serum vitamin D3 levels in patients with localized alopecia areata, although baseline vitamin D3 levels did not predict disease severity or treatment response.

This study found that photobiomodulation-irradiated conditioned medium from human adipose-derived stromal cells enhanced hair growth in mice, suggesting its potential as a treatment for hair loss by increasing growth factor secretion.

In this study, the researchers reported that a novel exosome-based treatment, EX104, effectively reversed hair follicle miniaturization and promoted hair growth in a mouse model of androgenetic alopecia, showing results comparable to minoxidil and surpassing it in stimulating capillary growth and follicular proliferation.

This case study reports that a 45-year-old woman developed a painless nodule in the lower lip four weeks after receiving hyaluronic acid filler, which required surgical removal, highlighting the potential for delayed complications from lip augmentation procedures.

This study evaluated the effect of intralesional injections of lyophilized Platelet Derived Growth Factors in 42 patients with Peyronie's disease and found significant reductions in penile curvature and plaque size, along with improvements in Peyronie's Disease Questionnaire scores, suggesting a potential treatment role.

This study found that conditioned medium from photobiomodulation-irradiated adipose-derived stromal cells enhanced hair growth in a mouse model of hair loss more effectively than non-irradiated medium, suggesting potential for treating alopecia by boosting growth factor secretion.

This study found that both microneedle delivery and intradermal injection of platelet-rich plasma were similarly effective for treating androgenetic alopecia, but microneedle delivery caused significantly less pain.

This review suggests that combining platelet-rich plasma with microneedling may produce better hair restoration outcomes for androgenetic alopecia than using PRP injections alone, but calls for more standardized research.

This study found that nanofat injection before hair transplant may improve the survival of hair grafts in patients with secondary cicatricial alopecia.

Nanofat injection is safe and effective for improving skin texture and patient satisfaction.

In this pilot study, cryotherapy using a device that precisely controls cooling duration improved hair regrowth for patchy alopecia areata when applied for 20 seconds with two freeze-thaw cycles, similar to standard triamcinolone acetonide injections, but not when applied for 10 seconds.

This study observed that six sessions of injections using a stabilized hyaluronic acid compound improved hair thickness, shine, density, and reduced hair loss in volunteers with moderate androgenetic alopecia, with excellent treatment tolerability and high satisfaction reported by 88.5% of participants.

This clinical trial found that transdermal delivery of 5-Fluorouracil using fractional CO2 laser resulted in a significantly better treatment response in alopecia areata patients compared to intralesional injections of the same drug, with a greater reduction in the Severity of Alopecia Tool Score.

This study found that while most women reported aesthetic improvement after PRP facial injections, objective skin analyzer data showed no significant changes, but midface volume improvement was more likely in those with lower platelet counts and higher estradiol levels.

This study found that intralesional injection of triamcinolone acetonide combined with latanoprost (a PGF2α analog) was more effective in treating localized alopecia areata, showing higher treatment response rates and greater reduction in severity scores compared to other treatments.

This study found that intradermal bleomycin injections induced dermal fibrosis in C57BL/6 mice, evidenced by hair follicle obliteration and dermal thickening, though no significant trends in gene expression were observed, indicating the need for further research to understand the link between fibrosis and dyschromia.

This study reviewed recent advancements in using botulinum toxin for treating androgenetic alopecia and emphasized the need for further research to determine the most effective injection sites and depths, as current strategies show inconsistent results.