Shunt malfunction is a partial or complete blockage of the shunt that causes it to function intermittently or not at all. When a blockage occurs, CSF accumulates and can result in symptoms of untreated hydrocephalus. A shunt blockage from blood cells, tissue or bacteria can occur in any part of the shunt.
Updated March 20, 2017. Allergy shots, or immunotherapy, are a series of injections that are given over many months to years and are not given as a single shot. What many refer to as a 3-month allergy shot,â on the other hand, represents a long-acting corticosteroid injection, such as triamcinolone (Kenalog). Many people swear by these long-acting steroid shots as a great way to get through their allergy season symptom-free.
Limits on the number of cortisone shots. There's concern that repeated cortisone shots might cause the cartilage within a joint to deteriorate. So doctors typically limit the number of cortisone shots into a joint. In general, you shouldn't get cortisone injections more often than every six weeks and usually not more than three or four times a year.