any one can suggest me a supplement for relive mucus buildup.

Never begin taking medication, including herbal supplements, without first checking with your doctor about any possible interactions. After that, your best bet is to go to a health food or vitamin store and ask what they suggest.

You might want to check out things with the following ingredients:
Boneset aerial parts
Fennel seeds
Fenugreek seeds
Horseradish root extract
Mullein leaves extract
Thyme

...How are things out there in Torrance, anyway?

Well, I am not sure WHERE the mucus are you talking about is building up... so any number of things could help or hinder or even hurt the situation.

Mucus is often the bodies way of managing a DIFFERENT problem.. such as something bad respiratorily, etc.. so it really IS a good idea to get a professional medical opinion before beginning a long-term treatment on your own.

On a more common note, if you have an issue with, say congestion and problems associated with the common cold, there are many over the counter medications that the pharmacist can recommend for you.

Good advice from 'Lex and Sher. You might have an allergy, and the mucus generated is nature's way of flushing out the allergens. So the answer is not to suppress the mucus, but to find the cause and treat that.