Skin, Hair and Nail Problems

I have melasma on left side of my thigh and on my left ankle for over 6-7 years now. Hoping it would fade on its own but it seems not. As of now I have only applied hydroquoine 2% on my ankle for short period. And it seems darker and unsuccessful to treat it. How can I remove it completely and permanently? Suggestions plz.

I'm having this issue since 3 years. When i take medice it goes fine but when i complete the course after that it again appear

I always have a hard time itching in inner thighs around genital and it's been more than a year. Please suggest home remedies for this, any recommended cream name is highly appreciated and I don't eat medicine/tablet unless there's no other option. Please don't copy paste answer when it's irrelevant to my specific concern. I've also attached image so as to get the relevant answers.

White Mark's in the corner of the lips has been developed for my father. It's been a week since they came. Please suggest the reasons and treatment of this.

I am having red shiny rashes and sometime scally skin at the upper joints of both arms. No itching. This issue persist for some days and again comesand again it goes away within a days. I don't know whether it is a allergy or skin condition. Whether this skin issue have a contradiction with the covid vaccine?? Does the vaccine impact side effects after adminiatering. Please suggest me

Which biotin supplement is best for hair? There are so many brands in market but which one do you think is best?

I have whiteheads and blackheads.. And their mild acne scars.. How can i get rid of them. Can i use retinol cream without askin dermo?

I'm facing dryness issue on face as well as body even after using Dove and pears soap and even Dove making my skin dark.face wash doesn't suit me.kindly suggest good medicated soap .

Xerosis problem no itching please                                               suggest any lotion...

I have a dark horizontal line across my nose and i have tried many cream and all but nothing is helping, please suggest a good treatment. Thank you!