Hydroquinone is used in the treatment of hyperpigmentation and melasma.

Hydroquinone bleaches the skin by reducing the accumulation of skin pigment called melanin that causes darkening of skin. It interferes with the synthesis of melanin and hampers important processes within cells that produce melanin (melanocytes). The bleaching effect of hydroquinone is reversible (reversible depigmentation)..

Skin irritation, Allergic contact dermatitis

• Please use hydroquinone products carefully. Its skin bleaching action may produce unwanted cosmetic effects if not used as directed.
• Use of sunscreen is a must while using hydroquinone. Avoid unnecessary sun exposures and cover the treated areas with clothing. Even minimal exposure to sunlight can reverse the bleaching effect of hydroquinone.
• Discontinue use and contact your doctor immediately if you develop allergic skin reaction or notice blue-black darkening of skin upon use of hydroquinone. 
• Hydroquinone creams are meant for external use on the skin only. Immediately wash-off with water, if the cream gets into your eyes, nose, mouth, or on your lips.
• Do not use hydroquinone creams on broken, irritated or injured skin.
• Do not use hydroquinone creams with other creams that contain peroxides (hydrogen peroxide/benzoyl peroxide). This may produce a dark stain on your skin which can be removed by stopping the use of peroxides and washing with soap and water.
• Do not use hydroquinone creams with other creams that contain resorcinol, phenol, or salicylic acid unless advised by your doctor.
• Please check, if the hydroquinone cream contains sulfites. Such products may trigger allergic reactions in individuals with asthma.
• You may be advised by your doctor to perform a skin sensitivity test to avoid any allergic reaction.
• Do consult your doctor before using hydroquinone, if you are pregnant or planning to become pregnant or breastfeeding.

Ques. Q. Is Hydroquinone safe/good for skin?
Yes. Hydroquinone is used to bleach dark patches of skin. It is available as creams to be applied externally and is safe if used as directed, for the prescribed duration by your doctor. Occasionally it may cause side effects-red, sore, itchy, inflamed skin indicating an allergic reaction. Please contact your doctor immediately if you notice any such skin reactions

Ques. Q. Is Hydroquinone a steroid?
No.Hydroquinone does not have a structure or effect similar to steroids

Ques. Q. Is Hydroquinone safe to use on face?
Yes.Hydroquinone is used to bleach dark patches of skin and can be used on the face. It is available as creams to be applied externally and is safe if used as directed for the prescribed duration by your doctor. Please limit sun exposures and apply sunscreens or cover the treated area with protective clothing. Even minimal exposure to sun can reverse the bleaching effect of Hydroquinone

Ques. Q. Does Hydroquinone bleach clothes?
No. Hydroquinone has no known effect on bleaching clothes

Ques. Q. Does Hydroquinone cause redness?
Occasionally Hydroquinone may cause side effects – redness of skin, sore, itchy, inflamed skin indicating an allergic reaction. Please contact your doctor immediately if you notice any such skin reactions.