The Master List
(I will edit this copy with any new suggestions):
1.
Drowning 
, asphyxia by submersion
2.
Blackout 
a. LOMC "loss of motor control (LOMC or LMC)".
b. SWB/SAMBA Shallow Water Blackout (scary)
c. DWB, Deep Water Blackout
d. Vacuum Effect.
e. Laryngospasm
3. CO2 Narcosis
4. "Free diver bends" = Nitrogen Narcosis
Presumably caused by repeated short duration, deep dives within a relatively short period of time.
5. Immersion hypothermia
6. Loosing out in other areas of your life (due to inattention)[ref. this thread]
a. Loosing your job
b. Loosing girlfriend/boyfriend 
c. "Tastes of enlightenment, leading to enthusiastic pro-active spiritual seeking at the expense of all other 3 dimensional pursuits"
7.
Decompression sickness - yes,
freedivers can get this.
8. Lung contractions
9. Cardiac arrest
10. Respitory arrest
11. Amnesia (where was I?)
12. Temporary paralysis
13. Cyanosis -- a bluish or purplish tinge to the skin and mucous membranes
14. Bleeding nose.
15. Eye pain
16. Stroke. Read
Nigel Dobier's poignant lifting buoy review.
17. "Immersion Diuresis"/dehydration
18. Diaphragm/abdominal injuries (more info. required here)
a. Strained Diaphragm
19. Injury by sea creature:
- poisoned (jelly fish, etc.)
- eaten/bitten (shark attack, congor, giant squid?,...)
- shocked (electric eel)
20. Infection -- sewage, bacteria/amoeba/prion/virus, farm run-off & other pollution
21. Poisoned/irradiated -- pollution e.g. mercury, fuel, chemical run off, Sellafield overflow, jellyfish
22. Collision trauma -- run over by a boat, ship, kayak, jet ski, whale-shark, anchor,...
23.
Brain Hypoxia. "Black spot on the brain" after blackout. ("black spot = little bit of brain dead, lost forever"). [ref. this thread]
24. Neoprene/rubber related issues (allergy, fetish, chaffing, pissette/bec du canard related issues, suffocation, loosing balance while suiting-up, fastening beaver tail around rail [ref. movie this thread], etc.)!
25. Asthma attack (chlorine/stress/allergy induced [also ref. talc issues below]).
26. Silicosis/talco-silicosis/talcum lung /Talcosis -- if you use talc or other dry powders instead of wet lubes to get your open-cell wetsuit on. [Also see asthma attack above].
27.
Loss of voice/raspy voice
28. Chronic sypmtoms similar to pulmonary hypertension. Caused by
"vasoconstriction caused by the dive reflex and hypoxia (kind of like in sleep apnea)."
29.
Sleep Apnea
30. Equipment failure: " Things like lift bags not inflating, getting tangled, or visits from curious marine life..." [ref.
]Tanya Streeter: a Deep Interview by Peter Scott on DeeperBlue.net - Fanatical About FreeDiving, Scuba Diving, Spearfishing & Technical Diving. Sled failure [see drowning, above]
31.
Arrythmia (irregular heart beat)
32. Entanglement in fishing line, nets, anchor lines, lobster pots, float lines, water ski lines, boat rails. Carry a knife, a big, sharp one with a serrated edge or powerful dive shears.
33. Choking on gum (check out thread on DeeperBlue -- I kid you not, caused heart attack too).
34. "getting jumped on/kicked/stood on/trapped underwater by other pool users" [ref. this thread]
35. Vertical split in toe nail on largest toes (caused by finning).
36. Speared [ref. DeeperBlue threads]
37.
hypocapnia - "a state in which the level of carbon dioxide in the blood is lower than normal; can result from deep or rapid breathing" -
hypocapnia - definition of hypocapnia by the Free Online Dictionary, Thesaurus and Encyclopedia.
38. Surfer's Ear. Bone growth around the outer ear caused by frequent exposure to cold water. Read the Devon 2006 thread to hear from sufferers (& surfers). Apparently quite common for spearos with other water sport interests.
Barotrauma 
39. "Lung Squeeze" = pulmonary oedema/edema (the one that kills high altitude mountaineers, along with the celebral variety).
40. Coughing blood.
a. Associated with Blebs (=bubbles)? "Foaming saliva with traces of blood".
(intra-alveolar hemorrhaging?)
41. Perforated lung/pneumothorax/collapsed lung.
43. Lung over-expansion injury
43. Ear injuries: perforated ear drum (, ruptures to inner ear/eustachean tubes??)
44. Sinus squeeze
45. Trachea squeeze
46. Tooth squeeze
Keep them coming (Any Doctors/Dentists/Nurses/Paramedics/lifeguards/patients/... out there?)
