Granuloma annulare (GA) is a common, sometimes chronic skin condition which presents as reddish bumps on the skin arranged in a circle or ring. It can initially occur at any age, though two-thirds of patients are under 30 years old, and it is seen most often in children and young adults. Females are two times as likely to have it than males. Signs and symptoms
Aside from the visible rash, granuloma annulare is usually asymptomatic. Sometimes the rash may burn or itch. People with GA usually notice a ring of small, firm bumps (papules) over the backs of the forearms, hands or feet, often  centered on joints or knuckles. The bumps are caused by the clustering of T cells below the skin. These papules start as very small, pimple looking bumps, which spread over time from that size to dime, quarter, half-dollar size and beyond. Occasionally, multiple rings may join into one. Rarely, GA may appear as a firm nodule under the skin of the arms or legs. It also occurs on the sides and circumferential at the waist and without therapy can continue to be present for many years. Outbreaks continue to develop at the edges of the aging rings. Causes
The condition is usually seen in otherwise healthy people. Occasionally, it may be associated with diabetes or thyroid disease. It has also been associated with auto-immune diseases such as systemic lupus erythematosus, rheumatoid arthritis, Lyme disease and Addisons disease. At this time, no conclusive connection has been made between patients.
Stridor (Latin for "creaking or grating noise") is a high-pitched extra-thoracic breath sound resulting from turbulent air flow in the larynx or lower in the bronchial tree. It is different from a stertor which is a noise originating in the pharynx. Stridor is a physical sign which is caused by a narrowed or obstructed airway. It can be inspiratory, expiratory or biphasic, although it is usually heard during inspiration. Inspiratory stridor often occurs in children with croup. It may be indicative of serious airway obstruction from severe conditions such as epiglottitis, a foreign body lodged in the airway, or a laryngeal tumor. Stridor should always command attention to establish its cause. Visualization of the airway by medical experts equipped to control the airway may be needed. Causes
Stridor may occur as a result of:

foreign bodies (e.g., aspirated foreign body, aspirated food bolus);
infections (e.g., epiglottitis, retropharyngeal abscess, croup);
subglottic stenosis (e.g., following prolonged intubation or congenital);
airway edema (e.g., following instrumentation of the airway, tracheal intubation, drug side effect, allergic reaction);
laryngospasm (from aspiration, GERD, or complication of anesthesia)
subglottic hemangioma (rare);
vascular rings compressing the trachea;
thyroiditis such as Riedels thyroiditis;
vocal cord palsy;
tracheomalacia or tracheobronchomalacia (e.g., collapsed trachea). congenital anomalies of the airway are present in 87% of all cases of stridor in infants and children. vasculitis. infectious mononucleosis
peritonsillar abscess
Laryngeal edema is a common cause of stridor post extubation (occurring from pressure of the endotracheal tube on the mucosa as a result of endotracheal tube that is too large (e.g. pediatrics), cuff over inflation, and prolonged intubation times.