Sneezing is a common occurrence in dogs, and is not always indicative of a medical condition.

Seizures result from abnormal electrical activity in the brain. Seizure activity varies from subtle staring to complete collapse and muscle spasms (convulsions).

Lymphadenopathy is enlargement of the lymph nodes, and is a common finding in many diseases, illnesses, and conditions.

Straining to urinate (stranguria) in dogs is a serious symptom indicating some degree of disruption of urine flow. Dogs will posture to urinate, with visible pushing. Straining may be productive or unproductive, and may be consistent or intermittent.

Squinting (blepharospasm) occurs when the eyelids are lowered so that there is only a small space for the eye to look out of. Squinting is considered a symptom in dogs if it continues for a prolonged period and is not related to protecting the eyes from bright light.

Subcutaneous lumps appear in dogs as abnormal growths or masses located under the skin. If the lump is manipulated manually, the feeling of a subcutaneous lump varies depending on the cause but it is a bump separate from the skin.