Side effects Group A (n=20) Group B (n=20) Group C (n=20) χ2 MCp
No. % No. % No. %
No side effects 0 0.0 20 100.0 14 70.0 100.00* <0.001*
burning pain 20 100.0 0 0.0 0 0.0
Wheal 20 100.0 0 0.0 0 0.0
Erythema 5 25.0 0 0.0 0 0.0
Post inflammatory hyperpigmentaion 0 0.0 0 0.0 6 30.0
p1   <0.001* <0.001*    
p2   0.020*    
Table 6: Comparison between the studied groups according to the side effects of treatment.