Anxiety for no reason?

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Hello everyone!

I am a Rescue diver with over 120 dives and a wide variety of specialties and skills. I dive once a month in training as I am an evidence recovery diver as a specialty for work. I travel about 4 times a year on vacations and dive recreationally on those trips; usually 10 dives each trip. I am not afraid of anything and never have been apprehensive. I've never had any issues with diving or any incidents.
In August 2017, while in Turks & Caicos, I had been diving all week with no issues. On my last day, about 20 minutes into the first dive, I had a very sudden wave of sheer panic come over me. I was at about 60 feet in depth. It hit me instantly and I felt like I wasn't getting enough air. I wanted to get out of the water and my breathing was hyperventilating. I felt claustrophobic and like the water was closing in on me. My skin felt tingly. But since I am trained to know how to handle these situations, I just kept talking to myself to relax. My breathing sucked through air and I did ascend up to about 45 feet slowly. After about 10 minutes, it subsided and I finished the dive. I had a second shallow dive without incident.
A few months later, in Jamaica, the same thing happened to me on the first dive. I tried to distract myself with underwater photography since I have a very nice rig, but nothing worked. I spent the entire dive talking myself out of panic and didn't pay any attention to anything else. I had a second shallow dive with no issue.
December 2017, we went on a cold water dive in Indiana. I felt myself constantly looking to the surface to make sure it was close. Luckily, it was only about a 30 foot dive so I had no issues.
My husband and I have talked in depth about this and now have a underwater signal in case it happens again. Thankfully, we dive very close to one another and are in sync with skill level and experience.
I thought it might be CO2 retention, so I would descend slower to try to see if that was the cause. I have no medical issues and am an extremely fit 33 year old female. I don't understand where this is coming from.... and I see other experienced divers having issues. I have a huge diving trip to the Philippines coming up and want to try to learn more! Any insights would be helpful!
 
Hello everyone!

I am a Rescue diver with over 120 dives and a wide variety of specialties and skills. I dive once a month in training as I am an evidence recovery diver as a specialty for work. I travel about 4 times a year on vacations and dive recreationally on those trips; usually 10 dives each trip. I am not afraid of anything and never have been apprehensive. I've never had any issues with diving or any incidents.
In August 2017, while in Turks & Caicos, I had been diving all week with no issues. On my last day, about 20 minutes into the first dive, I had a very sudden wave of sheer panic come over me. I was at about 60 feet in depth. It hit me instantly and I felt like I wasn't getting enough air. I wanted to get out of the water and my breathing was hyperventilating. I felt claustrophobic and like the water was closing in on me. My skin felt tingly. But since I am trained to know how to handle these situations, I just kept talking to myself to relax. My breathing sucked through air and I did ascend up to about 45 feet slowly. After about 10 minutes, it subsided and I finished the dive. I had a second shallow dive without incident.
A few months later, in Jamaica, the same thing happened to me on the first dive. I tried to distract myself with underwater photography since I have a very nice rig, but nothing worked. I spent the entire dive talking myself out of panic and didn't pay any attention to anything else. I had a second shallow dive with no issue.
December 2017, we went on a cold water dive in Indiana. I felt myself constantly looking to the surface to make sure it was close. Luckily, it was only about a 30 foot dive so I had no issues.
My husband and I have talked in depth about this and now have a underwater signal in case it happens again. Thankfully, we dive very close to one another and are in sync with skill level and experience.
I thought it might be CO2 retention, so I would descend slower to try to see if that was the cause. I have no medical issues and am an extremely fit 33 year old female. I don't understand where this is coming from.... and I see other experienced divers having issues. I have a huge diving trip to the Philippines coming up and want to try to learn more! Any insights would be helpful!
It may be just a normal hyperbaric immersion reaction for your particular body's physiology. Just relax and take whatever time you need at depth to regain a nominal slow & full Scuba diving respiration rate.

See video below at the 19:30 to 21:20 minute mark for a quick overview explanation (and watch the entire lecture presentation in the video when you have time):
Read also:
Advanced Knowledge Series: Basic Carbon Dioxide Physiology | Dive Magazine
 
Many years ago I went through Lamaze classes with my then pregnant wife. I am not prone to panic attacks but since then I find that if I am getting nervous, for no good reason, that if I do the breathing exercises they relax me. Had a visual migraine once many years ago. A couple times since then (but before I started diving) I felt one was close. Again the Lamaze breathing exercises stopped them.

Basically it is regular slow, deep breaths. You also visualize your body parts relaxing one by one. Feet relax. Legs relax, etc. ... So it also has a mental relaxation component.

Funny part is she hardly used it but I did. Dr and Hospital were not close and not near each other. We went to Dr. He said you are dilating, time to go to hospital. Wife wanted to go home and get some stuff. Dr. said no you are going immediately to the hospital and I will meet you there. This was before cell phones. On way to hospital wife has me pull over to a phone booth and she calls her sister in CT and is talking to her sister. So she is in the phone booth along the road chatting with sister, Dr is waiting at the hospital, and I am in the car doing Lamaze breathing to stay calm. We eventually get to hospital and are wheeled immediately into delivery room since she is now almost fully dilated.
 
Do those panic attacks only happen when in the water?
Any chance that your wetsuit is too tight across the chest or neck?

I was also told (not related to diving) that sometimes massaging the check right below the throat can stimulate the vagus nerve and help calm down a panic attack, you might look into that.

It might be worthwhile going through DAN to find an internist/endocrinologist or other specialist who can look for obscure medical reasons that might be behind this. CO2 might seem to be an obvious one, but then that might be tied into blood oxygenation overall somehow. (Not a doctor, just tossing out a guess.)

I've seen doctors get all bent out of shape when a pulse oximeter says 95-96%, but for some folks that IS their normal, and they live with it. A clearance from a doctor who is aware of these things and specifically how they affect diving, allows you to focus on other issues.
 

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