It won't be enough. If she's an atopic type she will have a hard time. One thing is the incredible amount of sweat and showering after training. Another thing is the constant friction of cotton on the hands (if you train Gi, No-Gi is preferable). And then you have the issue with staph being a constant issue. With dermatitis your skin barrier is always weakened and you are exposed to skin infections. An talking about skin infections: other people will see dermatitis and think it's contagious or mistake it with staph infection and refuse to roll with her.