Since it looks like you may be having difficulties with the site and I may not be on-line when you enter I will give you some information on lumps in dogs. It could potentially be an abscess or bug bite with the sudden swelling so starting with benadryl (diphenhydramine) 1 mg/ pound every 6 hours tonight along with some cool compresses to the area in 10 minute intervals.
Tomorrow (as long as there is no involvement of breathing compromise) to differentiate the cause if they are benign (noncancerous or infectious) lumps versus malignant (cancerous) lumps have your veterinarian evaluate and aspirate (poke with a needle) the lumps to evaluate the material under the microscope
This is really the only way to differentiate the concerning from the non concerning lumps definitively because a cancerous versus a noncancerous lump can appear identical on presentation
Evaluation under the microscope will be looking at the lump at a cellular level. Do the cells look normal, is it sebaceous or oil material that is benign or even fatty material indicating a lipoma or are the cells abnormal in appearance? This information is critical in order to diagnose the lump origin and whether it should be removed sooner versus later or if antibiotics and steroids are warranted to reduce the size
Some tell tale signs that a lump might be more of a concern include whether it is rapidly growing, it is bothersome (scratching, licking
), it is not easily picked up from the underlying tissue indicating it is attached to the muscle
layer. This can be helpful but not 100 % definitive as a fine needle aspiration would be
I always advise photographing the lump with a ruler or coin next to the lump to measure the size especially with it growing so rapidly. Having a photo tonight in comparison to tomorrow at your vet will be an added piece of the puzzle as far as what is going on with this lump.
If his breathing is affected, the lump continues to grow, begins to seep, he does begin to bother it tonight I would advise a veterinary er visit since it has grown so rapidly
Please let me know if this information makes sense and any additional questions I can assist with today
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