Welcome to healthcaremagic forum,
It seems you have taken the dark patches on your skin quite easy. It is increasing in number because you have been neglecting it since a year. You have sensitive skin. Skin discolorations and patches take time to return back to normal. They took almost a year to seek your attention so just have a little patience they will go away gradually.
You should firstly take heed to what you eat. You should increase your dietary intake of vitamin B and E. You can even take nutritional supplements containing vitamins and minerals
. Keep yourself well hydrated. Take 1-2 liters of water each day, plenty of fruits, juice and soups. Add cereals, legumes and dairy products in your diet. You do have the option to consult a dermatologist
The patches and discoloration can be because of some allergy
. You need to investigate and see what are the things around you like pollen, pet animals, allergy causing plants and foods to which your skin is sensitive and reacts adversely. Just stay away from them. It can also be due to sun burn, reaction to some type of jewellery, fur or leather. It can also be due to some bugs in your room or wardrobe. Just check it out.
Take bath with a medicated soap regularly. You can apply a good quality moisturiser. ( herbal will be better than a chemical product ). You can consult a beauty expert to exactly know your skin type ( normal, oily, dry ) to apply the best product applicable for you. You can enquire about a good body pack that will be helpful to reduce the patches ( turmeric and ayurvedic based ones are good) . Do not forget to put a branded sun-screen lotion when you are outdoors. Take vitamin E
supplements for better effects. Avoid wearing jewellery, fur, leather apparels around your neck and collar bone area. Prefer wearing good quality soft cotton clothes till you are fine. Have a good day, take care.