![]() If your dog suddenly develops hives, give him or her the antihistamine Benadryl (diphenhydramine) at a dose of 1 mg per pound of body weight (that’s 10 mg for 10 lb dog, 25 mg for 25 lb dog, and so on). Facial swelling-in which the dog’s face becomes puffy is a similar hypersensitivity reaction. They can range from about 1/4 inch to 2 inches or more in diameter. ![]() Hives are warm, firm, rounded swellings that crop up in groups when a dog has been exposed to an allergen, such as a spider bite, bee sting, pollens, or rarely, a medication or vaccine. They can be treated by providing thickly padded areas for resting, using warm compresses or soaks two or three times a day applying petroleum jelly, lanolin, vitamin E or another softening and soothing agent (make sure it’s safe to eat if the dog can reach the area and lick it off) and oral antibiotics if the area is infected. Sometimes these calluses crack and bleed or become infected. Large, heavy dogs often develop thick, dark, hairless calluses on the parts of their bodies that contact hard surfaces when they lie down, such as their elbows, hocks, or even over the breast bone. Wide margins are not necessary in the removal of lipomas. Lipomas that are large enough to make a dog uncomfortable or interfere with mobility should also be removed. If the contents include other types of cells, then the lump may not be lipoma, and it would be prudent to remove it surgically and have it checked by a pathologist. If the contents are just fat, you can be reasonably certain the lump is lipoma. The vet inserts a needle into the lump and extracts a drop of its contents to examine under a microscope. An FNA takes only a few seconds, can be done during a regular exam, and is virtually painless. If your dog has lipomas, your vet should (1) measure them during your dog’s yearly physical exam and note their location and size on your dog’s medical chart and (2) when each new lipoma appears and if one enlarges rapidly, do a fine needle aspirate (FNA) of the lump. They usually appear in middle-age dogs and older dogs and can range from 1 inch to 8 inches or more in diameter, growing slowly over months to years. They do not transform to malignant tumors over time. LipomasĪlthough these are commonly referred to as “fatty tumors,” they are benign, not malignant. If a sebaceous cyst is particularly messy or in an area where it constantly becomes irritated, it can be surgically removed. Sebaceous cysts will sometimes open and ooze their contents on their own, or the material can be squeezed out, but usually they will simply fill up again over time. They contain a whitish, greasy, paste like combination of oil, bacteria, and skin cells. These lumps are oil producing (sebaceous) glands that have become blocked and enlarged, ranging from mosquito-bite-sized to an inch or two in diameter. ![]() ![]() Pimples or blackheads elsewhere can be a symptom of a bacterial skin infection or seborrhea. Facial acne in dogs usually responds well to frequent cleaning with a benzoyl peroxide cleanser. Pimples and black headsĭogs can get “clogged pores” just like people do, and these may form pimples or blackheads. These should be surgically removed if they routinely bleed or become irritated, or if they grow on the eyelid margin and rub against the eye. Older dogs often grow warts on their heads or bodies – but these are not viral in origin, and may not actually be “warts” on biopsy as many are sebaceous adenomas. “Puppy warts’ are caused by a virus, appear in or around young dog’s mouth, and go away on their own. These firm, bumpy growths occur in both young dogs and middle aged to older dogs. No growth can be definitively diagnosed by its appearance alone, however, so point out such lumps and bumps to your veterinarian during your dog’s annual physical exam, and be sure to consult your vet if your dog has a lump that grows rapidly, oozes and doesn’t heal, or otherwise bothers you or your dog. Here is a guide to some typical skin growths in dogs. Fortunately, most are merely unsightly or messy rather than harmful. Dogs can sprout a variety of lumps, bumps, and skin growths, especially as they get older.
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