I have used a lense filter. Still some red spot appeared in my click.Please help me to sort out this problem. Thankew.
This looks like ghosting or other flare caused by a reflection off the back of a lens element or filter. Flat filters are often the most obvious offenders.
If you are using a UV filter for "protection"¹, remove the filter. If you are using a graduated ND filter or a polarizer, you must weigh the benefits of the filter versus the benefit of not having a reflection.