Cactus and succulents

Prickly Pear Encounters: Removing Glochids

A typical prickly pear cactus (Opuntia dillenii). The wicked-looking long spines are not all you have to worry about! Photo:

Opuntias (Opuntia spp.), popular indoor or outdoor cactus (depending on the species and your local climate) with mostly flattened segments, and often called prickly pears or beavertail cactus, are unusual among cacti in that they produce two types of spines. Long, fierce, painful ones that dig into the skin, draw blood and yelps and are very visible and, on the cushiony areole at the base of the vicious spines, tiny hairlike, barbed spines called glochids. 

Opuntia glochids
These tiny, fuzzy, almost caressable spines are actually glochids, particularly nasty spines that break off and penetrate the skin. Photo: jinjian liang,

While the long, nasty spines stay on the plant, glochids break off readily and work their way into the skin, causing itching and irritation that can, in sensitive individuals, last days, weeks or even months. You rarely recall actually running into glochids, as they seem harmless. But if you get any on your skin, the resulting rash is one you’ll likely remember for a long time.

Removing Glochids

Fingers with glochids attached
Ouch! Glochids are hard to remove. Photo: Marianne Skov Jensen,

Ideally, you’d only wear thick, long-sleeved gloves or use tongs when handling any prickly pear, but in case glochids do get to you, remove them quickly before they work their way into your skin. 

Glue and gauze being applied to skin.
First, tweezer off most of the glochids, then apply glue and gauze. Photo:

Believe it or not, how to remove glochids has actually been scientifically studied and the most effective method is to first go over the area with eyebrow tweezers, pulling off the most visible clumps of spines. Then cover the skin in the affected area with a thin layer of household glue (Elmer’s glue, for example), then lightly press gauze into the glue. Allow the glue to dry for about 30 minutes, then peel it off. According to this study, this will result in removing 95% of the glochids.

Other popular methods are less effective. Some people apply facial mask and pull them off that way. Others use sticky tape (duct tape, for example), softly pressing the tape over the affected sector, then yanking it off. But both methods left more of than half of the spines in the skin.

Once they’ve worked their way into your skin, though, you pretty much have to wait until your body reacts, causing dermatitis then pustules, then eventually expelling them.

My best advice is: admire your opuntias from a distance. They’re not a plant you’ll want to hug!

Larry Hodgson is one of Canada’s best-known garden communicators. He has notably been editor-in-chief of HousePlant Magazine, Fleurs, Plantes et Jardins, À Fleur de Pot and Houseplant Forum magazines and is currently the garden correspondent for Le Soleil and radio garden commentator for CKIA-FM Radio. He has written for many garden publications in both the United States and Canada, including Canadian Gardening, Harrowsmith, Horticulture, Fine Gardening and Organic Gardening. He also speaks frequently to horticultural groups throughout Canada and the U.S. His book credits include The Garden Lover’s Guide to Canada, Complete Guide to Houseplants, Making the Most of Shade, Perennials for Every Purpose, Annuals for Every Purpose, and Houseplants for Dummies, as well as nearly 60 other titles in English and French. He is a past president of the Garden Writers Association (now Garden Communicators International) and the winner of the prestigious 2006 Garden Media Promoter Award offered by the Perennial Plant Association. He resides in Quebec City, Quebec, Canada.

1 comment on “Prickly Pear Encounters: Removing Glochids

  1. Oh my, how simple; glue (NOT super glue) or tape. I never had much of a problem with them, so never investigated options for removal.

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