Small puncture type opening, area is slightly raised and missing hair, hard.
It sounds like your dog has a small puncture-type opening on its head that is slightly raised, missing hair, and feels hard to the touch. This could be due to several reasons, such as an insect bite, a small abscess, or a localized skin infection. Since it has been present for three days, here are some steps you can take at home to help manage the situation:
First, gently clean the area with a mild antiseptic solution like diluted chlorhexidine or iodine. This can help prevent any potential infection from developing.
Next, keep an eye on the area for any signs of infection, such as increased redness, swelling, warmth, or discharge. If you notice any of these signs, it would be best to consult a veterinarian.
Additionally, try to prevent your dog from scratching or licking the area, as this can cause further irritation or introduce bacteria. An Elizabethan collar (E-collar) can be very helpful in this situation.
You can also apply a thin layer of an over-the-counter antibiotic ointment like Neosporin to the area. Just make sure your dog does not lick it off.
Since your dog is already on flea and tick prevention, continue with the regular schedule to rule out any parasitic causes.
If the condition does not improve or worsens over the next few days, it would be wise to visit a veterinarian for a thorough examination and appropriate treatment. They might need to perform a more detailed assessment to determine the exact cause and provide specific treatment.
If you have any further questions, please feel free to ask. Thank you.