A lingering or neglected cold / allergy can easily develop into something more difficult such as sinusitis. When you have been suffering from symptoms of a cold for longer than 8 to 10 days and experience constant stuffiness of nose, headache and pressure in your head and face, you may well be suffering from sinusitis.
Sinusitis is the term used for inflammation or infection of one of the paranasal sinuses. Sinuses can be described as small, air-filled spaces (cavities) in the skull around the nose and eyes. Thus affection of the sinuses causes pain in the region of the cheekbones and forehead besides many other symptoms such as nasal obstruction, impaired breathing, fever, etc.
Double-blind, placebo-controlled studies done on the efficacy of Homeopathic medicines in the treatment of sinusitis have clearly shown that the treatment is effective and is without any adverse effects.