I was wondering what causes fingernails to turn yellow if you leave nail polish on for a long time. Is it bad? And what can you do about it?

The last time I was at the hair cutting salon, the person who washed my hair asked me if I washed my hair everyday. I said I did, and she said she could tell. I'm not sure what she meant by this, but please tell me how she could determine this, and what is the best overall practice for washing hair in terms of frequency. I'm interested in the health of my hair as well as the health of my scalp. Thanks for you help!

How do I know if my hair is oily or dry? Does it make a difference if I'm a guy with short hair?

What are the reasons for getting white hair in teenagers?

My fingernails fray and chip all the time. I have tried many different nail polishes and nail hardener but nothing helps. I've been trying to grow my nails for the past year and I just can't seem to get them to grow. My mother and older sister don't have any problems getting their nails to grow. Please give me some tips on how to make my nails grow stronger and fast.

I have been a vegetarian for two years. Since last year, I have been losing quite a bit of hair. I have no pattern of male baldness in either side of my family. I do take multi-vitamins everyday. My diet is fairly nutritious. Could there be any correlation between my vegetarianism and the hair loss? Some books point to folic acid deficiency so I have made an effort to buy vitamins with 100%-200% RDA recommended folic acid. Do you have any ideas on what might be causing this?

I am curious as to whether the nail bed regenerates or not. I used to bite my nails, and slowly I've bitten off some of the nail bed as well, on all ten fingers. It has been two years, and the nail bed does not seem to grow back, and my nails grow according to the new shape of the nail bed. It makes my hands look somewhat ugly, to be honest.

Any suggestions would be appreciated.

I would like to know the reasons for excess facial hair. Are there any solutions for it? How safe is electrolysis?

I was wondering about the chemical sodium laureth sulfate. I have received several forwarded e-mails about this causing cancer by a lawyer looking into the matter. This chemical was said to be in many shampoos to create a nice lather, but it's actually a garage cleaner and is a cheap substance for the manufacturer, and in the past, only 1 in 2000 would get cancer from this, and now it's about 1 in 10. I was just curious if it really causes cancer, or is it just a prank? And if it really does cause cancer, what kind of cancer is it? Thank you. I would appreciate an honest answer.

1) I have a really embarrassing problem... I have hair on my chest and I am a woman! It's not really thick, but it's very noticeable, and I hate it! Is this a hormone problem or is it normal? Please help, 'cause to me, it's gross and I will do anything to get rid of it. I have been shaving it, but it just grows back within a few days or so. Please help!

2) I am a 24 year old female and for the past few years I have had facial hair. I tend to get it on my chin and the side of my face. It is usually light but you can feel it, and I will never let my boyfriend touch my face unless I have just shaved it.

I don't want to go for laser treatment, is their anything else you could suggest? I feel disgusting and very unwomanly.

My wife has noted that she is recently losing hair at a much greater rate than normal. She feels her hair is significantly thinner (less density of strands) than in the past. What could be the cause of this?

My girlfriend and I were wondering about dying her pubic hair. Is it okay to use regular hair dye or are there special products to use for it?

I love getting my nails done with a gel or shellac manicure. The polish doesn't chip at all and stays shiny for weeks. I'm just worried about the UV light used to seal the manicure - it is almost like a mini tanning bed for your hands. What are the risks? And are there any bad chemicals in the polish?

1) I was born with thick and coarse hair. It all sticks up when it is short. I lose confidence when I notice that people always look at my hair. Is there any way I can make them softer? Will medication help?

2) I seem to have very untamable hair. I keep the hair on the side of my head really short because of this. It's not that my hair isn't uncombable or anything like that, but if the hair on my sides grow even the slightest they start sticking out at 45-90 degree angles to my head, and there is nothing I can do about (I've tried everything but STIFF STUFF....). I look at other people's hair and they don't even need to blow dry or comb it and it sticks firmly to the sides of their heads. Is there a reason why some people have such easy control over their hair? Is it something I'm eating or doing wrong? Thank you for any advice!

I have taken three Depo-Provera shots. My hair started falling out excessively several months ago. In looking for answers I found out that this is a side effect to the shots. I was not informed of that before I took the shots. I saw in one of your Go Ask Alice! answers that depo-provera suppresses the Follicle Stimulating Hormone and the Luteinizing Hormone. What is this hormone? Is this what makes my hair fall out? And do you know if there is anything I can do to stop it? My next shot is due by May 15 but I am not going to get it. Thanks.

What is up with this new trend of putting food products like olive oil or avocado juice into hair? Is it more healthy than using shampoo?

Is it dangerous to wax or use a chemical depliatory such as Nair on areas of the skin that have moles? I've seen warnings on some labels regarding this. What could happen to the moles?

I have a problem. I am a 21-year-old male with the face of a 15-year-old. What I mean is that I am unable to grow facial hair. I was late starting puberty and it has left me underdeveloped. My baby face is affecting people's trust in me, especially at my job. I am constantly referred to as the kid and I feel that I am never really taken seriously. I am wondering if there are any types of drugs that can possibly aid in my facial hair growth problem and, if there are, what are the side effects? Please help me. I am sick of being a man trapped behind a child's face. Thank you in advance.

I am an incoming international student and I would like to keep doing some laser hair removal sessions. I know laser hair removal has become really a "fashion" and I would like to go somewhere safe, since I am concerned with my skin. I do not know the city, and I would like to know if there is any place that can be safe to do this.

I've been swimming a lot this summer and I have noticed a green tint to my blond hair. Is this caused by previous dyeing? Is it possible to remove the green tint? Thanks for your time.

I have dandruff that responds well to over-the-counter shampoo. Ergo, I have been using the stuff almost exclusively for ten years. No brand in particular, sometimes zinc pyrithione (the blue stuff!), sometimes coal tar (the smelly brown stuff!). Anytime I switch to non-dandruff shampoo for like three to four days straight, I get my dandruff back. I worry that I might be addicted to dandruff shampoo. Should I worry?

Ever since high school, I've had very oily hair and skin, but it became worse in college. Now I'm in my mid-twenties and have to shampoo my hair about 10 times each day to get it clean. Then by evening it's already oily again. This isn't my scalp trying to moisturize itself after being over cleaned, because I've tried not washing it completely and it's even oilier the next day.

Are there any special shampoos or medications that help reduce oily skin? I've tried some facial products from my dermatologist, but they haven't reduced the oil production. This is an embarrassing problem and limits the overnight activities I can do, like camping or staying with friends.