It can be cleared...Undergo glutathione therapy.. otherwise few creams also available...for detailed prescription do direct online consultation by sending photos.

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

This hyperpigmentation is transient. With early treatment, it can be cured. Kindly consult online for a detailed prescription

Pigmentation over nose and cheeks happen due to the hormonal changes this is called cloasma .this will reduce  usually after delivery . However for better diagnosis and treatment consult the dermatologist.