Please help. Ill for several months. Infectious Disease ruled out infection. Waiting for Neuro appt. Hoping to identify at least the cause of one of the dozens of symptoms. Considered parasites and fungus but fungal growth negative. Here is a good example of what is left in clean underwear after a short time wearing. This same "white substance" is discharged via the eyelids, nose and mouth.
Also, this is the shape is often coughed up from sinuses. CT chest scan clear.