my daughter is 8 and a half year old but she has very dark underarms neck elbow and knees in this age only she is getting dark circles also please suggest or guide me

A. Dark circles should be associated with nutritional deficiency like multivitamin can also be associated with too much of screen time which has become very very common these days and lastly could be associated with improper sleep habits and routines I think looking at what you’re saying you should definitely consult your doctor and for dark areas like knees and elbows you can apply a scrub of coconut oil honey Sugar and coffee into that and gently scrub leave it for 10 minutes and then wash it if you do it every day this will give you good results