You should upload photographs so that your problem can be appreciated better. Blanket Anti depigmentation soap or creams dont work like that unless one knows what exactly is the cause of depigmentation

Pigmentation or darkness of the skin can be because of many causes. Suntan, being overweight that is sedentary lifestyle, some pigmentation disorders like acanthosis nigricans for melasma, nutritional deficiency etc are some conditions. unless I take proper history and examine the affected area, a diagnosis cannot be made. please don't do any home remedies because if they go wrong it can worsen the problem. Please send photos using online consultation for proper examination diagnosis and treatment

Its possible to achieve your basic color back and maintain a flawless glowing skin by taking a skin brightening treatment regimen for 6-8 months, consisting of- -sunscreens -skin lightening creams -antioxidants and multivitamins -external treatments like peels. - Q-switch laser - Oxy Facial, photofacial or skin brightening medical facials. After this you will have to maintain the results by application of sunscreen and moisturisers daily. A combination of all these treatments help you in achieving lightening of the pigment. Stick to the treatment for 8-10 months and take optimum sessions as advised by the dermatologist.

Skin lightening creams are available. Use a sunscreen regularly. Share pic. Consult me on practo for detailed prescription.