3 months post op. I think I've suffered shock loss. Some redness in shock loss spot. Is this redness an issue? No pain (Photo)

If you are having issues after surgery, especially with "redness" you should contact your doctor.  Based on photos it is difficult to assess if it is a normal part of the healing process.

The redness is because the
scar is still healing, additionally if there was tension on the closure you can get some
shock loss. Oftentimes in this scenario it will regrow within the three to six month window.
If the area doesn’t regrow, four treatment options exist:
The first is a scar
revision to cut out the bald tissue.
The second is SMP (scalp micro-pigmentation)
The third is to
transplant FUE into the scar
The last option would be a combination of options two and
three. 
 

3 months is fairly early still- I wouldn't worry too much about it. As long as the redness begins to fade and there aren't other symptoms with it like burning, etc. just wait it out for now. I would expect it to start evening out over the next few months. It would never hurt to get a second opinion from your doctor though.

Sometimes  there may be such a early phase alopecic, bald spots  in donor areas after FUE surgery,  but fortunatelly most are transient. İt may happen because of over harvesting or transient post traumatic shedding /shock loss. Any way it heals and hair regrow in 4-5 months of hair restoration surgery .

You should return to see your doctor as this might be a point of infection which might require treatment