Sudden pain, burning, or stinging at one spot
Redness around the bite area
Swelling or warmth at the site
Itching or tenderness
A small puncture mark, sometimes with two tiny marks
A blister or raised bump
Skin color changes around the bite
Symptoms that get worse over hours instead of improving
Muscle cramps, nausea, sweating, headache, dizziness, or fever
A wound that turns dark, opens, or looks like it is spreading
If you did not see the spider, it may be hard to know for sure
Seek medical care if symptoms are severe, spreading, or you feel unwell