Menthol crystal for nose block/ sinus

Eversince returning from Glasgow, I have been suffering with a blocked nose due to allergy to temperature change. Nasal sprays worked for awhile but I did not want to continue taking it forever. The gp also said once I stop taking the spray, my mucus secretion will be higher.

This week I was down with a fever and a really bad, painful sore throat. It also does not help that the nose decides to be blocked too. So, sleeping at night can be a hassle because I have to breathe through my mouth, which makes my throat hurts more.

The gp recommended some allergy tablets and also menthol crystal for my blocked nose. They really look like crystals!

I was told to put a few pieces of me thol crystals into hot water in a cup and breathe from it. Being my first time, putting one or two tiny crystals didnt feel like it would work. So, I added five more! When I added the hot water and inhaled the steam, woosh it went straight up my nostrils. It felt like i was having a mint sweet. It was very minty and when the steam gets into the eyes it hurts.

Miraculously, my nose was completely cleared in ten seconds. It was like magic.

But the cleared nose didnt last long. As I fell asleep my nose blocked again:( 

Will try a lower concentration of menthol tonight with more inhalation to see if it works.