Sabha, Clinique is great for sensitive skin but it's not a fantastic foundation for full-coverage! I suggest Bobbi Brown, the foundation stick blends easily.. and can be topped-off with loose or pressed/compact powder. Use a concealer to hide u're blemishes as well Makeup Forever has nice ones that have long-lasting staying power.
Shanno, for actual spots u can use tea tree oil and wash u're face with a medicated facewash, once u're acne is gone then work on u're scars. The red sandalwood remedy is effective for pigmentation and acne scars and can be used 3-4 times a week.. u can add honey to it honey is a great moisturiser and lemon juice acts as a "bleaching agent".
Maria, what was it caused by? Some women have dark patches during pregnancy.. if they're really dark then u'd prolly have to use prescribed creams/gels instead of home remedies :)
Sabha, for the irritated skin blend 1 tablespoon fresh cream and 1 tablespoon oatmeal with enuff honey to form a paste and leave on for 20 mins wash-off and pat u're skin dry with a tissue and dab on milk.