Hello and welcome to healthcare magic!!!
If you are having trouble retracting your skin over the front of penis it is called phimosis
and if you are able to do it but have developed pain and burning sensation over the area it could be balanitis
. In either case it is curable you dont need to worry at all. Consult a urologist
in your city who will be available in any superspeciality hospital since we dont know where you stay.