Hi Drew! In the following link it says you should see a doctor if redness occurs, etc:
http://www.aloha.com/~lifeguards/als...html#seaurchin
Some more info:
Sea Urchins
Spines might contain some venom and bring infections. Very few fatal cases were reported (usually from respiratory problems), but most cases bring mild to severe pain for few hours to infections that could last for months, especially is pieces of spines are left in the wound. Removal of spines should be done surgically or with extreme caution not to break them more into the wound
SEA URCHINS:
(The black long-
spine urchin, Diadema Setosum is the most venomous variety; The red sea urchins such as Toxpneustes Elegans and Asthenosoma Jimoni produce milder symptoms.)
REGION:
In warm waters, Abundant on ocean floor and cling to rocks and coral, wrecks ect. Injury from spine is most common. Venumus urchins can be very dangerous.
DIAGNOSIS:
The spines penetrate soft tissues and produce redness, swelling, and intense burning the venomous spine or pedicellariae have poisonous tips and 3 pronged biting teeth which cling long after detachment.
SYMPTOMS:
Traumatic injuries of the skin by spines of sea urchins without envenomation are well known. They may break off in a puncher wound causingconsiderable local reaction, often givs rise to infection. Some spines are absorbed within 16 to 48hr, where as other may need to be removed surgically. Both the venomous and nonvenomous spines can give rise to granulomatous nodular lesions. Injuries by pedicellariae, immediate intense pain, localized swelling and redness about the wound, an aching sensation in the involved part, nausea and syncopy.
IN SEVERE CASES:
Difficulties in respiration, parasthesia about the mouth with some atonia of the muscles of the lips, tongue, larynx and eyelids and sometimes the muscles of the limbs. Complete atonia and ataxia may occur.
TREATMENT:
Remove spines immediately with forceps, pedicellariae must be searched out and also promptly removed; brittle tips may break off and if not absorbed within 48 hours must be surgically excised; purple discoloration at the point of injury is a pigment of the spine and is not dangerous although often worrisome to the patient; Shoes and gloves offer little protection from the spines; the diver or swimmer should avoid contact with these urchins.
and drain them.
"A BRW Original"
