I'm sorry to hear that. Is it soft or hard? Does it change in size? Is the skin above it like other areas or hard/with marks/etc?
There are many things to consider and at times tests to run before we can give a final opinion. I recommend consulting a general surgeon. They deal with various kinds of lumps and can guide you extensively.
For further consultation, you can choose from our list of best Neurologists in Lahore and seek in-person advice.