The use of hydroquinone rid itself of unwanted age spots and freckles are safe in most cases. You can try a bit of treatment on a small area of skin to make sure that does not cause irritation. This is similar to when you die your hair. If you can tolerate the treatment, because most people it is safe to use on the skin. Hydroquinone cream is very well tolerated. Some women may be small and temporary irritation of the skin, including mild itching or stinging and redness of the skin (irritant contact dermatitis). If they do not disappear stop using the cream.
Side effects includes severe burning, itching, swelling or crusting of the treated areas (possible allergic contact dermatitis), and abnormal skin if you have any of them contact to doctor please.
Do not use Benzoyl peroxide, hydrogen peroxide or other products when using hydroquinone. A temporary dark spots on the skin may occur. If you accidentally used together, wash skin with soap and water to remove stains.

Hydroquinone creams may contain sodium metabisulphite, which may lead to severe allergic reactions (including anaphylaxis) in some sensitive people.

Hydroquinone should not be used during pregnancy or while breastfeeding.It is banned in France and some people think that it can cause cancer.

Other ingredients of these creams

Mercury
Mercury is the active bleaching creams on the skin and can cause brain damage. This has led to a big scare, and the Minnesota state has received. As a result, it is prohibited on all products in which mercury was intentionally included in the composition.
Arsenic
Sounds toxic, and that is exactly what it is. It includes chemicals used in pesticides and herbicides, which are highly toxic to humans. This deadly substance can cause cancer in various forms: the lungs, skin, bladder, prostate, liver and kidneys.
Alpha Hydroxy
Alpha Hydroxy Acids are typically found in facial chemical peels. Many plastic surgeons use this procedure if the client has a serious condition of the skin. This procedure is only rarely. Try not to use at home. It is reserved for professional use.

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