His hair may be a general indication of health conditions? Maybe. Some health conditions and treatments affect the body as well as in hair.

Dandruff
Dandruff is not contagious. However, how the powder white powder may appear in the hair still is not clear properly. One theory says because due to excessive mold growth. Other causes of skin is too dry or too fat.

Although dandruff is not harmful to health, but dandruff can also be one of the symptoms of psoriasis. To reduce the piles of dandruff and dead skin cells, anti-dandruff shampoo every day. Leave the shampoo on for five minutes before rinsing.

Yellow Scales
If you find bits of dandruff in head-shaped yellow and oily, you may be suffering from seborrheic dermatitis. This is an inflammation of the skin condition that occurs when skin has many oil glands.

Seborrheic dermatitis related to hormones and the conditions of the fungus. Some cases may be due to factors of neurological disease. Like dandruff standard treatment, is use of anti dandruff shampoo. In more severe cases, consult a dermatologist.

Fall
Experts say that our hair to fall out normally around 100 chapters each day. This is a natural thing because 90 percent of the 100,000 hair follicles we have always grow back. Approximately 10 percent are in a resting phase (telogen), and fall off after 2-3 months and replaced by new hair. And so on.

Resting phase (Telegonus) may occur because of something that is shocking the body systems, such as surgery, childbirth, diet, stress or thyroid problems. Two months later, hair starts to fall, but most grow back.

Bald Spot
Disturbances in the immune system can cause the immune system attacking our own body. When the attack hair follicles, alopecia areata is called, can cause hair loss in a specific part (hair bald) or fall off completely.

Typical Male Baldness
Most cases of hair loss in men caused by heredity. This type of derivative known as hereditary baldness alopecia. are clear signs hairline back, more bald in the center of the hair or both.

Dull Hair
Too often exposed to sunlight can cause the hair is dry, hard, and branching. If your hair is fine at first, sun exposure can damage the scalp. Therefore, selecting hair care products have sunscreen.

Excessive hair, such as using a hair dryer, bleaching, coloring, and even combing your hair too often can damage the cuticle layer of hair and make it dry and boring.

Normally people will laugh when you see or hear something funny. But sometimes the laughter can be a serious indication of medical symptoms. When laughter is a symptom of a disease?

As long as it is known that laughter is a sign of happiness and can also improve your mood better.

But if someone suddenly laugh for no apparent reason, migratory movements or tics, and looks a bit confused, then it might just laugh proved a symptom of the disease.

If someone laughs, without a deliberate and repetitive, there is the possibility the person has a pathological laughing (Pathological Laughter).

This phenomenon is a sign of an underlying medical disorder and usually affects the nervous system. Pathological laughter is not affiliated with a sense of humor, joy or other expressions of happiness.

The human brain works like the cockpit of the human nervous system. This nervous system sends a signal that involuntary actions like breathing and intentional conduct audits, such as walking or laughing.

When the signal is chaotic, such as chemical imbalances, the abnormal growth of the brains or birth defects, may lead to a strange smile.

Some medical conditions characterized by symptoms of pathological laughter, namely:

1. In 2007, a girl (3 years) in New York experienced an unusual attack, and grinned and laughed during the seizure.

Doctors discovered that he is a rare form of epilepsy that causes involuntary laughter was. Finally doctors forced to perform an operation for benign tumors in the brains removed and forced laughter is healing.

2. Brain Tumors or cysts can also cause uncontrollable laughter and embarrassment.

3. Acute stroke can also be marked with pathological laughter.

4. Angelman syndrome, a rare genetic disorder that attacks the nervous system.
People with this disorder usually does not involve and was always pleased with the attitude often smiling and laughing. This is because an increase in the stimulation of the brains that control happiness.

5. Gilles de la Tourette syndrome
Is a neurobiological disorder that a combination of tics and loud noises cause. Other symptoms that people can laugh for no reason.

6. Drug Abuse or chemical addiction.
In these two conditions are the result of a smile on the way damage the nervous system transmits signals.

7. Dementia and fear can also cause abnormal laughter.

Consciously or not, in the treatment of stress and depression, a woman is more sensitive than men. Recent research shows that there are biological reasons behind it.

Recent studies in mice showed, women are more sensitive to low levels of stress hormones than men and are able to adapt. Because mice have a nervous system similar to humans, a study in mice has implications for humans, although the stress in humans is more complex.

Women are more prone to depression, posttraumatic stress disorder and anxiety disorders. No half-hearted, it happened two times more than men. However, hitherto unknown biological mechanisms that cause.

In his research, Rita Valentino, scientists from the Children’s Hospital of Philadelphia, with focus on corticotropin releasing hormone (CRF) in the brains released in response to stress, both in humans and mice.

CRF is a neurotransmitter that helps the communication signals between nerve cells. Some nerve cells send signals that CRF receptors and some to accept.

In female mice, the nerves that bind CRF receptors, are more strongly to the hormone, and certainly more responsive than in male mice.

Moreover, after obtaining the stress, male mice have an adaptive response, called internalization, in the brains. These cells will reduce the number of CRF receptors results in less responsive to stress hormones. In female mice, the mechanism of such adaptation does not appear.

“This was a study on animals and can not be established biological mechanism similar to humans,” said Valentino. However, the identification of the mechanism of CRF in stress-related psychiatric disorders, may be relevant to know of human biology, he added.