Black fungus risk factor: Diabetes (uncontrolled) Steroids high dose Hospital exposure Unsterile masks. HIV You have none of the above risk factors. Eye heaviness and strain can be due to refractive error, do you wear spectacles? The black fungus does not come out of nose. It will perforate the skull /palate (it erodes the bones)

Black fungus at age of 25 almost impossible Plz check HBA1C to see whether you have diabetes Black fungus is seen in immunocompromised patients In healthy patients it's almost impossible

Are you taking any medications such as steroids??Is there any swelling??

It can be black fungus, since it's very similar to black fungus morphology. Heaviness in eye is also common presentation of mucor.