EXCESSIVE YAWNING
Causes
There are several different excessive yawning causes.
Excessive yawning reasons include:
Physical Causes—Fatigue, general tiredness, body temperature malfunctions, and stimulation of the vagus nerve can cause frequent yawning. Excessive yawning and sleep disorders are often correlated.
Emotional Causes—Anxiety and depression can lead to yawning excessively.
Medication—It is rare for medications to trigger yawning.
Life-Threatening Causes—Strokes and tumors can cause regular yawning.

Gottrons sign. DERMATOMYOSITIS

Red Man Syndrome with Vancomycin

Hemolytic Uremic Syndrome

Allen Test