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.

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 boyfriend and I have been together for almost three years, and we've lived together for more than one, but I still can't do Number Two when he's in the house. It's not a problem during the week when we both go to our separate jobs, but on the weekends, it's usually just the two of us in the house all day (and night) Saturday and Sunday and if I feel the need to poo, I have to wait until Monday. My question is this — are there any adverse health issues I should be concerned about with waiting to poo? I know that holding your pee can give you bladder infections, but is there a similar issue with Number Two?

What should I eat if I have acid reflux?

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 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 had a miscarriaged pregnancy 8 days ago. And for the past 6 days, I’ve been throwing up everything I eat. It's like morning sickness, but morning, noon, and night. And I can't get out of bed without feeling the need to throw up. What do I do? What is wrong?

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!

After every meal, I get serious gas, bloating, and other yucky stuff. This is with ALL kinds of foods. I'm taking fiber for constipation, which is cool, but I get messed up even long after I take my fiber. What's the story?

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?

I have had terrible stomach problems for a few years now. My doctor says it's due to my love of greasy and oily foods, and that I should concentrate on eating healthier, broiled foods. Do you think if I continue on this unhealthy eating cycle, that I could develop gallbladder problems? Also, do you think my diet contributes to my acne-prone skin? Thanks for your help.

1) I've suffered weird digestive things when I have my period. The way I have heard it explained in my MCAT class is that the same hormone that causes the smooth muscle of the uterus to contract unfortunately works on all of our digestive organs as well, particularly the large intestine. So that's how I've come to grips with the apparent confusion of the digestive processes during my period.

2) Does a person's menstrual cycle regulate her bowels in any way? I have had some problems. The week before I get my period, I have loose bowels and the week afterwards I am quite constipated. Is this normal? Is there anything I can do?

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.

What natural food or herb can help soothe stomach ulcers?