I have applied some aloe Vera gel on my LO hands due to insect bites. But how come there's black mark after healing? Thought aloe vera gel is very mild for baby to use ? How to remove the black mark ? Thanks to advise

I reckon the best is to let it heal naturally. Baby has delicate skin -- introducing other creams or gels might aggravate the spots further. I would usually recommend lemon juice because it lightens dark spots for me but then again, it's acidic and might be too much for baby's delicate skin.