There are a multitude reasons as to why your scalp may be itchy. Very commonly, it could be an allergic reaction to your hair care product that is coming in contact with your scalp.
Other reasons for an itchy and flaky scalp could be dandruff, dry skin, product build up, certain conditions such as eczema, dandruff or even head lice.
It is very important to ascertain the cause for your scalp itching and flakiness. The most important lifestyle measure you could take is to maintain a good scalp hygiene. Wash your hair once or twice a week and make sure that your rinse out your hair completely clean.
If the cause of your problem is an allergic reaction to your hair care product, simply stop using the offending product and switch to gentler, sulfate free alternatives.
If the reason for your itchy scalp is dryness, use a good quality oil serum to help lock in the moisture and protect your scalp. Also make sure that you rinse your hair with lukewarm and not very hot water as hot water can worsen a dry scalp.
Remember to clean your hair brushes, combs and other tools on a regular basis to avoid the transfer of product residue and debris into your clean scalp.
If your problem persists or worsens despite the above measures, please consult your doctor. He or she can help guide you to the right solution.