Skin, Hair and Nail Problems

I witnessed few blisters (probably) on my lower back. Its Painful (moderate). Please prescribe best medicine for this and consult how to avoid such kind of phenomenon in future.

He is having extreme dandruff in winters and also itching Could you please suggest shampoo and tablets

My receeding line are going very down and at the crown baldness is started , and I had started the dr ready Mintop 5% solution and follihair tablet . After Using 3 month these things , I have notice no improvement so I visited the dermologist , they suggested keraXl M solution and follihair hair tablet .. Now I want to ask Dr ready Mintop 5% is better or Kera xl M is better ?

Dr prescribed azelaic acid 15% gel, a ret gel 0.025% ahaglow foaming s face wash this medicine taking from two months, deriva ms cream already used six months, acne scars and acne not cured which type of acne scars present, which is best procedure for this type of acne scars, without procedure acne scars cured by only medicine and creams, is it possible to cure acne scars 100% by any procedure

Does Deriva bpo gel helps in removing acne marks ?? Can I use it on marks after acne heals  .?? ...?

Does ils injection work 100% for reducing keloid?? Because I read online that it gives results only for few people. Injection used for me was 40 mg

How safe and effective is 1% Darkenyl (contains taxifolin glucoside + N-acetyl-tyrosine) application to scalp for reducing grey hair? I was suggested to use 1ml every night before sleep for 6-9 months. Yet to start with this. I have about 5% grey hair.

From past one week he is having burning sensation on hand n it has become red colour with skin coming out.. suddenly I noticed the sanitizer which I was sending him to school is having very strong smell n had become watery so thinking may be because of that as I'm not able to see the expiry date as it has been erased but not sure because of what it is.. I have attached the picture for reference please help me to find out what is the problem..

I have rashes on my arms and back and slightly on the legs.. those are multiple black spots amd do not feel bumpy

I am eating sabifin tablets and using oilments prescribed by doctor After 4weeks my course completed i stopped eating medicine Again iching started from the next day I cant sleep, facing irritation Kindly suggest