Vascular tumors are abnormal growths that originate from blood or lymphatic vessels. Their symptoms depend on location, size, growth speed, and whether they are benign or malignant. Common manifestations include:

1. Visible skin changes
   Red-to-purple raised patches, nodules, or “strawberry” marks that may enlarge rapidly during infancy and then slowly regress .
2. Localized swelling or lump
   A soft or firm mass under the skin or within muscles that can expand and distort nearby tissues .
3. Pain or tenderness
   Intermittent aching or constant sharp pain if the tumor presses on nerves, ulcerates, or becomes thrombosed .
4. Bleeding or ulceration
   Superficial lesions may crack and bleed with minor trauma; ulcerated areas can form crusts or scars .
5. Skin discoloration and warmth
   A bluish hue, prominent veins, or increased local temperature suggest high blood flow within the lesion .
6. Functional impairment
   Tumors near joints, eyes, airway, or digestive tract can limit movement, cause proptosis, produce wheezing, or lead to bleeding in the stool .
7. Neurological signs
   When lesions involve the brain or spinal cord, patients may develop headaches, weakness, numbness, or vision problems .
8. Systemic symptoms (malignant forms)
   Fatigue, weight loss, or night sweats may accompany aggressive tumors such as angiosarcoma or Kaposi sarcoma .

Any rapidly enlarging, painful, or ulcerated vascular lesion merits prompt imaging and specialist review to exclude malignancy and prevent complications.