1. Vitamin A:
Overdoing of vitamin A in supplements or medications can trigger hair loss, according to the American Academy of Dermatology. The recommended dose is 5,000 International Units (IU) per day for adults and kids over age 4. If you stopping taken, the hair will come back after few months.
2. Hormonal Changes:
2.1. Women after given bird, because of the hormonal changes. During the pregnancy, because the hormones are high , women lose less hair, but after a bird, the hormones going down and it is normal to loose more hair.
2.2. So switching or going off birth-control pills or menopause can also cause telogen effluvium ( hair loss) and it may be more likely if you have a family history of hair loss.
2.3. Polycystic Ovary Syndrome (OPC)- An excess of androgens can lead to ovarian cysts, weight gain, a higher risk of diabetes, changes in your menstrual period, infertility, as well as hair thinning. Because male hormones are overrepresented in PCOS, women may also experience more hair on the face and body.
3. Any kind of physical trauma and emotional stress such as surgery, a car accident, or a severe illness, even the flu—can cause temporary hair loss. When we are under stress or physical diseases your body need and consume more nutrients to normalize your health, and less nutrients will go to the hair. ( Increase your dose of Multivitamins or B-complex to help)
4. Lack of Nutrients:
a. Proteins - This can happen about two to three months after a drop in protein intake.The main source of proteins : meats, fish, eggs. Vegetarians need to find others sources of protein.
b. Iron - lack of iron causes Anemia. In addition to hair loss, other symptoms of anemia include fatigue, headache, dizziness, pale skin, and cold hands and feet. Almost one in 10 women aged 20 through 49 suffers from anemia due to an iron deficiency. You doctor will have to do a blood test to determine for sure if you have this type of anemia.
c. Vitamin B deficiency - A simple supplementation with B- Complex should help the problem. B vitamins are needed every day because your body did not "storage" vitamin B. Find natural vitamin B in fish, meat, starchy vegetables, and non-citrus fruits. A balanced diet plentiful in fruits and vegetables as well as lean protein and “good” fats.
d. Dramatic Weight Loss can cause lack of essential nutrients for the hair, proteins, vitamins, and others.( If your body did not have enough nutrition for the primary functions of the body, the hair will not receive the nutrition they need, since the vital organs are protected first.
5. Thyroid imbalance:
Check with your doctor the health of your thyroid; a small imbalance can cause thinning hair and hair loss.
6.1. Autoimmune diseases:
Alopecia Areata is the result of an overactive immune system that do not recognize they on cells, can be related with stress.
6.2 Certain classes of medication may also promote hair loss. More common among them are certain blood thinners and the blood-pressure drugs known as beta-blockers. Other drugs that might cause hair loss include methotrexate (used to treat rheumatic conditions and some skin conditions), lithium (for bipolar disorder), nonsteroidal anti-inflammatory drugs (NSAIDs) including ibuprofen, and possibly antidepressants.
Anabolic steroids—the type abused by some athletes to bulk up muscle—you could lose your hair, according to the American Academy of Dermatology. Anabolic steroids can have the same impact on the body as polycystic ovary disease (PCOS).
Vigorous styling and hair treatments over the years can cause your hair to fall out. Examples of extreme styling include tight braids, hair weaves or corn rows as well as chemical relaxers to straighten your hair, hot-oil treatments or any kind of harsh chemical or high heat. Because these practices can actually affect the hair root, your hair might not grow back.
6.4 - Male Pattern Baldness and Female Pattern Baldness- When you can find a cause listed above, the cause it will be related Male & Female Pattern Baldness. Please look to the post Candida and Hair :Loss.http://naturalhairtreatments.blogspot.com/2012/08/candida-and-hair-loss.html