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Why is my dog's head suddenly bald and hair not growing back?

Updated On September 23rd, 2025

My dog has a bold spot on his head and he didn't have it before so no hair has grown in that area since.

4 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 6th, 2017

It could be that he suffered an injury in that spot, causing the hair loss. It can take weeks to months for fur to grow back in fully. It could also be due to a medical illness such as ringworm. It's always a good idea to have any hairless spots checked out by vet to determine if there is a medical problem causing it so it can be treated as needed.

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    Answered By Daniel Fonza, DVM

    Veterinarian

    Published on January 12th, 2018

    Hi there and thank you for using pet coach to address your concern. From your description, this may have been secondary to trauma or a previous infection and the hair is not able to grow back because of damaged hair follicles. If the area is red or inflamed, I would recommend having a veterinarian examine him so that the most appropriate diagnostic and treatment recommendations can be made. Otherwise, I would monitor for now and if the area worsens I would have it looked at sooner.

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on May 29th, 2018

    The bald spot appears to be hair loss only as the skin looks ok. I would suspect he may have an overpopulation of Demodexx mites on his skin that has caused this hair loss area. I would recommend taking Duncan to your vet for a skin test to check for mites. if mite overpopulation is the cause then he can get on medication to help resolve this and also prevent further spread of the hair loss and/or secondary bacterial infections on his skin. Another possible cause is that he may have licked the hair off due to an underlying itch/allergy. If the hair is regrowing, it may jsut need more time. It can take 2 months for hair to completely regrow. Best of luck wiht your pet Duncan and I hope his hair loss resolves soon. Take care.

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    Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

    Veterinarian

    Published on June 13th, 2018

    This presentation could be due to a trauma or localized spot of skin infection (likely to be caused by bacteria but fungal and mites infestation are possible as well). A check up, appropriate disinfection and possibly antibiotics (oral, topical or in a shampoo formulation) are needed to solve the problem. Disinfection may be started at home with very diluted hibiscrub or betadine or salted water baths. Buster collar may be useful as well to avoid any scratching. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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