Dogs can be affected by various types of parasites, including internal parasites (like worms) and external parasites (like fleas and ticks). Here are some common symptoms associated with different parasites:

1. **Fleas**:
- Intense itching and scratching
- Red or irritated skin
- Flea dirt (small black specks) in the fur
- Hair loss in patches

2. **Ticks**:
- Lethargy
- Loss of appetite
- Fever
- Swelling around the bite area
- Lyme disease symptoms, such as joint pain and swelling

3. **Intestinal Worms (e.g., roundworms, tapeworms)**:
- Vomiting or diarrhea
- Weight loss despite a good appetite
- Abdominal bloating or distension
- Worm segments in feces or around the anus (especially for tapeworms)
- Scooting (dragging their rear on the ground)

4. **Heartworms**:
- Coughing
- Fatigue during exercise
- Weight loss
- Swollen abdomen due to fluid accumulation
- Fainting or seizures in severe cases

5. **Mites (e.g., sarcoptic mange)**:
- Severe itching and scratching
- Red, inflamed skin
- Hair loss
- Secondary infections due to scratching

If you suspect your dog has parasites, it's essential to consult a veterinarian for proper diagnosis and treatment. Regular preventive measures, such as flea and tick treatments and heartworm prevention, can help keep your dog healthy and parasite-free.

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Topics covered in this question:

Dog Health Parasites Symptoms Flea And Tick Intestinal Worms