Black Underarms are usually the causes of embarassment.  You cannot wear your favorite dress specially the sleeveless ones. 
Some causes of black underarms are because of friction due to tight dresses you wear.  Some may have been because of improper washing and caring.  And alsowith the excessive use of chemicals like deodorant and alcohols.  Shaving also can cause underarm to darken as dead skin will occur due to friction or maybe because of the improper way of shaving.
Worried about dark underarms?
Here are some home remedies for dark underarms that you …

Dry Hair.  Even after you have washed your hair its still the same, dry and looks dull.  Dry hair are caused by either external or internal forces.  Too much exposure to heat may caused hair to dry.
Here are some external causes of dry hair

Harsh shampoo
Shampooing too often
Hair dye
Hair perms
Chlorine in swimming pools and hot tubs
Overuse of the blow dryer or curling iron
Too much exposure to sun and wind
High mineral content in local water supplies

So the first step is preventing it from getting to these external factors.  Dry Hair Home Remedies

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A toothache, also known as odontalgia or, less frequently, as odontalgy, is an aching pain in or around a tooth. In most cases toothaches are caused by problems in the tooth or jaw, such as cavities, gum disease, the emergence of wisdom teeth, a marginally cracked tooth, infected dental pulp (necessitating root canal treatment or extraction of the tooth), jaw disease, or exposed tooth root. Causes of a toothache may also be a symptom of diseases of the heart, such as angina or a myocardial infarction, due to referred pain. …

Mangroves are used in folk lore medicines and have reported to cure some kind of illnesses.  There are different specie of mangrove which somewhat have different uses in terms of medical.  Barks and extracts of it have many uses and proven to be effective in both humans and animals. 
See Full Article here and some illnesses that can be treated by mangroves
The Wonder Mangrove

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Gas, flatulence, and bloating can be uncomfortable and embarrassing. Fortunately, there are some natural remedies that can help. Before trying any natural remedy, however, it’s important to consult a qualified health care provider to rule out other causes.

Treatment Strategies
1. Chew food carefully. Carbohydrate digestion begins in the mouth. Any work your teeth don’t do, your stomach will have to do later.
2. An alternative practitioner may suggest an elimination and challenge diet. This is a diagnostic diet to help uncover food sensitivities and intolerances.
3. Consult …

Pimple

results of a blockage of the skin’s pores

The popping of pimples is never medically recommended, as it can lead to bleeding and scarring. However, it remains a popular method to relieve the discomfort some pimples inflict, and it immediately destroys the pimple. Popping is done by applying pressure around the area, forcing or “popping” the clog out of the pore. The result can be varied, anything from nothing but a small red mark that will heal in less than a day, to a small …

Acne can occur to any ages.  It appears in oil producing areas of our body: the face, chest, back, neck and upper arms.  It does not only bring physical effects to the person but also in psychological and social aspect of the person’s life.  It may lead to social withdrawal, decrease in self esteem and self confidence.  Worst cases if this will left untreated, it may lead to disfiguring and scaring in the areas where it appears.  Proper caring and treatment must be applied.

We do sometimes had a wrong information …