P

Paget's disease of bone

Paget's disease of the breast

Pancolitis

Pancreatic cancer

Pancreatic cysts

Pancreatitis

Panic attacks

Paraneoplastic pemphigus

Paraneoplastic syndromes of the nervous system

Paranoid schizophrenia

Parkinson's disease

Parvovirus infection

Patellar tendinitis

Patent ductus arteriosus (PDA)

Patent foramen ovale

Peanut allergy

Pectus excavatum

Pelvic inflammatory disease (PID)

Pemphigus foliaceus

Pemphigus vulgaris

Penicillin allergy

Penis fracture

Peptic ulcer

Pericardial effusion

Pericarditis

Perimenopause

Periodontitis

Peripheral artery disease (PAD)

Peripheral neuropathy

Peritoneal mesothelioma

Peritonitis

Pet allergy

Peyronie's disease

Phantom pain

Phenylketonuria (PKU)

Pheochromocytoma

Phobias

Pilonidal cyst

Pinched nerve

Pink eye (conjunctivitis)

Pinworm infection

Pituitary tumors

Pityriasis rosea

Pityrosporum folliculitis

Placenta previa

Placental abruption

Plantar fasciitis

Plantar warts

Plaque psoriasis

Pleural mesothelioma

Pleurisy

Pneumonia

Pneumonic plague

Pneumonic tularemia

Pneumonitis

Pneumothorax

Poison ivy rash

Polio

Polyarteritis nodosa

Polycystic kidney disease

Polycystic ovary syndrome

Polycythemia vera

Polyhydramnios

Polymorphous light eruption

Polymyalgia rheumatica

Polymyositis

Pontiac fever

Poor color vision

Post concussion syndrome

Post polio syndrome

Post traumatic stress disorder (PTSD)

Posterior cruciate ligament injury

Postherpetic neuralgia

Postpartum depression

Postpartum preeclampsia

Postpartum psychosis

Postpartum thyroiditis

Prader Willi syndrome

Precocious puberty

Prediabetes

Prehypertension

Premature ovarian failure

Premature ventricular contractions (PVCs)

Premenstrual dysphoric disorder (PMDD)

Premenstrual syndrome (PMS)

Presbyopia

Preterm labor

Primary aldosteronism

Primary biliary cirrhosis

Primary immunodeficiency

Primary lateral sclerosis (PLS)

Primary open angle glaucoma

Primary progressive aphasia

Primary sclerosing cholangitis

Primary syphilis

Proctitis

Proctosigmoiditis

Progeria

Progressive supranuclear palsy

Prolactinoma

Prostate cancer

Prostate gland enlargement

Prostatitis

Pseudoclaudication

Pseudofolliculitis barbae

Pseudogout

Pseudomembranous colitis

Pseudomonas folliculitis (hot tub folliculitis)

Pseudotumor cerebri

Psoriasis

Psoriatic arthritis

Pubic lice (crabs)

Pulmonary embolism

Pulmonary fibrosis

Pulmonary hypertension

Pulmonary valve stenosis

Pustular psoriasis

Pyloric stenosis

Pyoderma gangrenosum