Why does my dog have a bald patch with black skin on his thigh?

There are a number of things that could cause excessive itching with hair loss and blackened skin. The most common possibilities would include allergies, fleas, a bacterial or fungal skin infection, or skin mites (mange). If she's also acting weak, I would be concerned that she may also have some type of systemic illness like liver or kidney disease, anemia, hypothyroidism, or Cushing's disease. It would be best to have her examined by a vet as soon as possible - he/she can do some simple skin tests as well as blood work or other testing if needed to help determine what's wrong and get her started on appropriate treatment.

A low thyroid is definitely a possibility that is contributing. Allergies from something in the environment, fleas or food can also play a role. The dark pigmentation with the creases on the legs can also be a secondary yeast or bacterial infection that is making this worse. he needs to see a vet to have the thyroid checked and address the skin infection. From there a medicated shampoo in a weekly bath is helpful. They can see what might be the underlying cause and get you appropriate medicine to try to stay ahead of it in the future.

It may be due to true skin problems like allergy or skin infection. However, if she doesn't show excessive skin itchiness or redness she may have hormonal problems (diabetes, underactive thyroid gland, overactive adrenal gland etc). You shoud get her checked by your vets. They are likely to recommend skin testing and blood test to find out what is going on.

Hi there and thanks for posting this question. Certainly there can be many causes for this, but young dogs commonly will have a mite called demodex mite. I suspect by the age and description that this may be the problem. I would recommend that he be seen by a veterinarian. They will likely do a skin scraping to look for mites. If positive they will discuss treatment options. I hope this helps and thanks for using Pet Coach!

This is likely a pysiological alopecia, especially if it is in front of both ears and about the same size. If the are a expands, then there is a skin problem that needs to be investigated by your vet. However, if the skin looks healthy, and the area stays the same, then there is nothing to worry about. If Mila tries to scratch the area, then you should have her ears checked by the vet for an infection or mites.

This is a pretty large area of hair loss and dermatitis. I can’t tell which part of Leia’s body this is, but I do think you should have your vet examine her. She may have a skin infection, parasites or even an autoimmune disease causing this.

The main reasons for hair loss include allergies, other primary dermatologic conditions, certain endocrine diseases, or self-inflicted trauma. Based on the look of the skin, it doesn't appear to be irritated or itchy.. Usually hair loss without itchiness is attributed to a systemic problem or something immune mediated in nature. Lastly, there are also some instances where dogs and/or cats can lose hair for no apparent reason without their being any sort of problem. To figure out the reason with certainty, some testing of the affected area would be required. If Bryant isn't showing any other problems right now and the area of effect is not growing in size, it isn't really an urgent thing to get checked out. Continue to monitor for changes and seek attention should the time come when it becomes necessary. Hope this makes sense.