In the Philippines, when doctors cannot explain the cause and cannot find a cure for the sickness of people, we go to a faith healer. When things happen we can't explain who are we to decide what does and does not exist.
This happened during my high school years in my parents' house back in our hometown.
My room which is in the between the room of my parents and my sister 
When I checked from the outside, there were no hard things hanging that could have touched the window railing to produced any sounds. Since the knocking began that evening, my headache started too and I thought because of my astigmatism so my mother has my eyes checked and got me eyeglasses but almost a month passed and still the headache continued. AND SO THE KNOCKING. So every night the knocking continues and so my headache. So what I did was sleep with my parents' room. I thought it would be stopped but guess what? IT KNOCKED INTO MY PARENTS' WINDOW RAILINGS TOO!
A friend of my mother suggested finding an albularyo a faith healer, who performs a ritual called "pagtatawas" or the use of candles especially for cases involving supernatural causes. He carries out a traditional ceremony, melting candle wax into a spoon, pouring it into the water and reading the shape formed. Luckily, she found one. Many people traveled from different places just to seek help from this albularyo and known for his success stories of his "patients".
That evening of the same day, my parents and I were at the albularyo's house. I grew up in our place where many albularyos exist but I know some are fake so at first, I didn't believe with this man. He immediately prayed while holding my head. He then lit a candle and prayed again. When he was finished, he poured the molten candle unto the water, let it formed, gave it to us and asked:
What do you see?
My mother got the formed molten candle and it only took her 5 seconds to see it and without hesitation, she blurted out.
Ay, duwende! (A dwarf!)
I asked my mother to show it to me and there it was, in a 2-inch formed molten candle, a clear picture of a drawf's head, with a long beard, pointed nose, wearing a hat. My father who was not a believer in supernatural just look at the candle silently. Then the albularyo said
It lives in your front yard, in your narra tree.
There was no way he could have known it. It is easy to say, a tree but to specify it as narra, I knew right there, he was telling the truth and I remember my neighbor was telling us about the dwarf they have seen in their house few times. The mother and her 2 kids (same of my age) saw it and was running, trying to hide everytime they see it.
He told me to light a candle every evening for 7 days in the narra tree, offer a prayer and "talk" with the duwende who was disturbing me.
Back at home, I lit my first candle. I was a little bit scared but the albularyo assured me that it was a good drawf. A white one and wanted to be friend with me. So I talked with "it" and said
I am scared. I wanted to be your friend my I am scared. And I hope you will understand.
There was no knocking on my window railings for the first 6 nights. On the 7th, I heard a very light knock before I sleep. I was scared at first but I replied, "Thank you". Like he was saying a goodbye. Since then, the knocking and my headache stopped.
Truly, you wouldn't believe anything unless you experienced it. This is not a story about ghost but it is supernatural experience for me in any way. Thank you #jerrybanfield for this story contest.
@deveerei