Hi. Thanks for your query. Read and understood your problem of swelling and pains in the glands near the Adam s apple., painful swallowing, lots of phlegm, increased pain on sneezing, yawing and coughing. The possible causes are: Tracheo-laryngitis. In this condition the respiratory apparatus and the cartilages that make the neck respiratory passages get inflamed. The mucosal lining too gets so much inflamed , hence produces too much of secretion. The treatment is in the forms of: Therapeutic dosages of Vitamin A and D, as these are most important for healing. Antibiotic, anti-inflammatory medicines. Whenever required, steroids. Nebulization. Investigations of blood, urine, Phlegm, X-ray of the chest and as necessary.