Skin, Hair and Nail Problems

I have this weird thing on my hand, what could this possibly be? Can this be harmful or is it just cosmetic?

Does intake of caffeine promote hair growth or it decrease ?

I'm 28 year old male , I have noticed that my hair is disappearing , first at my beard and now at moustache ..I can see a spot where there were hairs 20 days ago and now it is blank .. no iching ..is it normal or any skin condition ? I'm sharing a pic of that blank spot under my chin ..you can see there is a spot at moustache too ..

Hello, I just want to know which vitamin should be good for hair so that if there any deficiency also we can correct immediately

I was using betnovate n cream from past 10 yrs.I was using it night only ( not in a day time ). I used to apply a thick layer of this cream. Now I stop Using it from 2 months. I am having redness, itching, dry skin, small blisters on my face.. I used aloevera and glycerin and Cetaphil cleanser. I'm facing side effects of betnovate N redness, itching, dull skin,pimples on face .any suggestions/remdies for this problem. Plz help me to get rid of this.

Can I use alum on my face(for smoother skin )on a daily basis ..is it safe to use it on a daily basis?..can it have any side effects ?

I'm using Azelaic acid cream (exazel N) for Mild Acne and Acne marks Can I mix it with my moisturizer (Cetaphil moisturising lotion) Or should I use it before or after my moisturizer

What will happen if I apply minoxidil in face (for beard as my doctor suggested) and after 1 hour i just wash my face with water (water only) will the action of minoxidil break down??

I am suffering from oily scalp.and my scalp is very itchy too.  But my hair is so dry ...please suggest what to do...

My scalp itches when i eat spicy food or get in hot conditions. Please tell me what is the reason for it