No, checking your credit score doesn’t lower it… It is a myth..
So, there are two types of credit enquiries - Soft and Hard..
Soft enquiry is when you check your credit/cibil score by yourself for analysis, understanding your credit. This doesn’t impact your score.
Hard enquiry is when banks/lenders check your score, while you apply for a credit card or loan…this impacts your score.
So, soft enquiry is advised to do, as it will help you in understanding and maintaining your credit, but avoid unnecessary hard enquiries, like don’t apply for so many loans or credit cards.