Guilin Watermelon Frost is brown-black in powder form. Has a special smell. Guilin Watermelon Frost clears heat, detoxifies, reduces swelling and relieves pain. It is used for sore throat, sore mouth and tongue, swollen or bleeding gums, sore throat, thrush in children and mild burns and trauma bleeding. Acute and chronic pharyngitis, tonsillitis, stomatitis, and oral ulcers have the above syndromes.