Is blepharitis chronic or curable?

Chronic. Check for underlying nasal congestion, postnasal drip which can secondarily lead to swollen irritated eyelids. Along with topical meds, a trial of Mucinex (guaifenesin) is worthwhile if there are nasal or sinus symptoms.
Chronic. Can be controllable with lid hygiene, antibiotics, sometimes short course of topical steroids for inflammation, treatment of other associated conditions like rosacea.
Chronic. Blepharitis, crusting and inflammation of the eyelid margin, is a chronic condition that requires constant maintenance. Improving the health of the eyelid margin and meibomian glands will improve your symptoms, but failure to maintain proper lid hygiene will lead to a recurrence of symptoms.
Generally chronic. Blepharitis is a common condition which often affects older patients. Oils secreted from glands within the eyelash margins begin to build up and irritate the eye and surrounding eye skin. This may also occur in younger patients with rosacea who have acne and overactive oil production. In these patients, styes and chalazia commonly result from the inflammatory response to the oil buildup. Blepharitis is generally chronic but it may be treated either with good daily hygiene: a washcloth soaked in an astringent detergent such as baby shampoo applied to the eyelashes two to four times daily (most conveniently at night before sleep and in the am after showering) to debride the eyelash margin of any oil buildup. In recalcitrant cases, a steroid or steroid/antibiotic ointment applied after lid scrubs will help reduce inflammation and bacterial load. Finally, in cases of rosacea, the oral antibiotic Doxycycline is very helpful in reducing oil production.