The Combination of Red and Blue Light, Radiofrequency and Intense Pulsed Light for the Treatment of Facial Postacne Erythema

Figures & data

Table 1 Effective Rate of Treatment of Post-Acne Erythema Lesions

	Excellent (>90%-100%)	Good (60%-89%)	Fair (30%-59%)	Poor (0 to<30%)	Efficiency
Second week	0 (0%)	64 (12.8%)	292 (58.4%)	144 (28.8%)	64 (12.8%)
Tenth week	114 (22.8%)	238 (47.6%)	96 (19.2%)	52 (10.4%)	352 (70.4%)
18th week	360 (72.0%)	109 (21.8%)	25 (5.0%)	6 (1.2%)	469 (93.8%)
26th week	396 (79.2%)	86 (17.2%)	14 (2.8%)	4 (0.8%)	482 (96.4%)

Table 2 Erythema Index at Different Stage

Before Treatment	After Treatment
	Second Week	Tenth Week	18th Week	26th Week
496.17±79.11	419.56±80.78	325.44±81.21*	198.14±77.82**	89.32±81.58**

Notes: The data represent mean scores with error bars corresponding to the standard error of the mean, *p<0.05, **p<0.01.

Table 3 Changes in Degree of Acne Erythema Before and After Treatment

	3=Deep Red	2=Dull Red	1=Faint Erythema	0=Clear
Before treatment	350 (70.0%)	125 (25.0%)	25 (5.0%)	0 (0.0%)
After treatment	2 (0.4%)	14 (2.8%)	372 (74.4%)	112 (22.4%)

Figure 1 Changes in degree of acne erythema before and after treatment. Decrease in the intensity of post-acne erythema lesions is confirmed by the subsequent decrease in erythema indices after treatment.

Figure 2 (A) Before treatment. (B) After the end of red and blue light treatment (at second week). (C) After RF treatment (at tenth week). (D) after 2 times of IPL treatments (the 18th week). (E) After 4 times of IPL treatments (the 26th week).