What Causes Reddish Patches On Face?

hello,sir. im a 21 year old male with sensitive skin.my weight is 72 kgs and ht-5ft 9in.im suffering from light red patches on my cheeks,am i suffering frm hyperpigmentation?or something else.ive use sunblocks before stepping out and even have used natural home remedies like lemon juice.are these permanent?can i have more of these in future?or this is just because delhi summers are scorching.