It's better you take oil bath daily. It will nourish your skin n improves skin tone.

Your skin is the reflection of your body and mental health. And health depends upon the type of nutrition u r providing to brain and body.If there is any stress then yoga and meditation is the best option. Avoid spicy , oily and junk food. Drink plenty of liquids daily.  Take good amount of fibrous diet daily. Take proper sleep at night. And if yor r suffering from any disease then get it treated as soon as possible.

R u having any stress then relieve it with stress relieving yoga technik. Get pleanty of suficient sleep . Drink suficiant quantity of liquids. Avoid bright sun light and use sunscreen lotion to avoid further darkning .

Hyperpigmentation of skin may be due to some metabolic/ systemic diseases. So check ur thyroid function, diabetic profile, obesity. If lesions are only over exposed parts, mostly due to sunlight allergy; avoid that by sunscreen lotions, suncoat, goggle etc.