After you fire up the barbecue grill, the charcoal briquettes you use as fuel are eventually reduced to a pile of charred remains and ashes. This residue contains recycled plant material and naturally occurring minerals, but it may also contain harmful chemicals.
Burst blood vessel in the eye. Straining, coughing or injuring your eye can sometimes cause a blood vessel to burst on the eye surface, causing a bright red blotch. This is called a subconjunctival haemorrhage.
A burst blood vessel could be caused by many things including diabetes, high blood pressure or a blockage of one of the retinal arteries or veins. A variety of potential treatments are available but the prognosis depends on the severity and location of the bleeding.