Hello, my first thought especially given your current medial conditions, its a sign of lack of oxygen. Your skin may be telling you that not enough oxygen is getting through to certain organs and systems that make up you. Definitely follow up with your primary doctor or local health professionals to make sure this is not an urgent situation, and for a safe plan of action to correct this symptom moving forward. In the mean time, increase your water intake and slowly and steadily you can tackle this head on by making small changes to your daily routine to increase your blood flow and oxygen levels. Safely, being mindful of your asthma, copd, an morbid obesity, increasing oxygen levels and blood flow slowly through low impact exercises like walking and stretching will make a significant difference. Your skin breaths oxygen just like the rest of your body. Chair exercises, moving your arms and legs and doing small things that will not push your heart rate too much or too high, or take your breath away is where you want to start. Your heart has to work harder to pump your blood throughout your body when you are diagnosed with something like morbid obesity impacting your oxygen; slowly tackling this by adding the exercises along with small changes to your nutrition you may see results in your skin within a few days or weeks. Try a little massage therapy on your legs and arms, massaging your skin will naturally increase blood flow and circulation impacting your oxygen levels. With your dietary and nutritional adjustments you may notice that your symptoms with gerd may also improve. I strongly encourage you to check first with your primary care doctor before making even some of these small suggested changes to prevent and avoid having an adverse reaction; especially if you are taking medications for these conditions. The changes in your exercise regime are safe so long as you start slow, and you will want to talk with your doctor about your nutrition/dietary changes in lieu of your present medication list; staying safe is the ultimate goal in making these changes. If something else is causing this, then your primary doctor will want to administer some tests to further investigate your concern. If something more serious is causing this, you will want to get to your doctor right away for testing and analysis for a correct and proper diagnoses. Remember a second opinion is only one appointment away especially if you are seeking better health and you are not getting results with your current medical professional. If you try the massages on your arms and legs and you notice a difference in the color of your skin and it worsens, schedule an appointment. If the color of your skin improves then it is safe to say that you can continue the massages through your abdomen and include neck rotations to continue the blood flow to your neck, face and scalp. I hope this helps, good luck!